This is wget.info, produced by makeinfo version 4.0 from ./wget.texi.

INFO-DIR-SECTION Networking tools
START-INFO-DIR-ENTRY
* Wget: (wget.info).            A utility for network download.
END-INFO-DIR-ENTRY

INFO-DIR-SECTION Net Utilities
INFO-DIR-SECTION World Wide Web
START-INFO-DIR-ENTRY
* Wget: (wget).         The non-interactive network downloader.
END-INFO-DIR-ENTRY

   This file documents the the GNU Wget utility for downloading network
data.

   Copyright (C) 1996, 1997, 1998, 2000 Free Software Foundation, Inc.

   Permission is granted to make and distribute verbatim copies of this
manual provided the copyright notice and this permission notice are
preserved on all copies.

   Permission is granted to copy, distribute and/or modify this document
under the terms of the GNU Free Documentation License, Version 1.1 or
any later version published by the Free Software Foundation; with the
Invariant Sections being "GNU General Public License" and "GNU Free
Documentation License", with no Front-Cover Texts, and with no
Back-Cover Texts.  A copy of the license is included in the section
entitled "GNU Free Documentation License".


File: wget.info,  Node: Top,  Next: Overview,  Prev: (dir),  Up: (dir)

Wget 1.6
********

   This manual documents version 1.6 of GNU Wget, the freely available
utility for network download.

   Copyright (C) 1996, 1997, 1998, 2000 Free Software Foundation, Inc.

* Menu:

* Overview::            Features of Wget.
* Invoking::            Wget command-line arguments.
* Recursive Retrieval:: Description of recursive retrieval.
* Following Links::     The available methods of chasing links.
* Time-Stamping::       Mirroring according to time-stamps.
* Startup File::        Wget's initialization file.
* Examples::            Examples of usage.
* Various::             The stuff that doesn't fit anywhere else.
* Appendices::          Some useful references.
* Copying::             You may give out copies of Wget and of this manual.
* Concept Index::       Topics covered by this manual.


File: wget.info,  Node: Overview,  Next: Invoking,  Prev: Top,  Up: Top

Overview
********

   GNU Wget is a freely available network utility to retrieve files from
the World Wide Web, using HTTP (Hyper Text Transfer Protocol) and FTP
(File Transfer Protocol), the two most widely used Internet protocols.
It has many useful features to make downloading easier, some of them
being:

   * Wget is non-interactive, meaning that it can work in the
     background, while the user is not logged on.  This allows you to
     start a retrieval and disconnect from the system, letting Wget
     finish the work.  By contrast, most of the Web browsers require
     constant user's presence, which can be a great hindrance when
     transferring a lot of data.


   * Wget is capable of descending recursively through the structure of
     HTML documents and FTP directory trees, making a local copy of the
     directory hierarchy similar to the one on the remote server.  This
     feature can be used to mirror archives and home pages, or traverse
     the web in search of data, like a WWW robot (*note Robots::).  In
     that spirit, Wget understands the `norobots' convention.


   * File name wildcard matching and recursive mirroring of directories
     are available when retrieving via FTP.  Wget can read the
     time-stamp information given by both HTTP and FTP servers, and
     store it locally.  Thus Wget can see if the remote file has
     changed since last retrieval, and automatically retrieve the new
     version if it has.  This makes Wget suitable for mirroring of FTP
     sites, as well as home pages.


   * Wget works exceedingly well on slow or unstable connections,
     retrying the document until it is fully retrieved, or until a
     user-specified retry count is surpassed.  It will try to resume the
     download from the point of interruption, using `REST' with FTP and
     `Range' with HTTP servers that support them.


   * By default, Wget supports proxy servers, which can lighten the
     network load, speed up retrieval and provide access behind
     firewalls.  However, if you are behind a firewall that requires
     that you use a socks style gateway, you can get the socks library
     and build Wget with support for socks.  Wget also supports the
     passive FTP downloading as an option.


   * Builtin features offer mechanisms to tune which links you wish to
     follow (*note Following Links::).


   * The retrieval is conveniently traced with printing dots, each dot
     representing a fixed amount of data received (1KB by default).
     These representations can be customized to your preferences.


   * Most of the features are fully configurable, either through
     command line options, or via the initialization file `.wgetrc'
     (*note Startup File::).  Wget allows you to define "global"
     startup files (`/etc/wgetrc' by default) for site settings.


   * Finally, GNU Wget is free software.  This means that everyone may
     use it, redistribute it and/or modify it under the terms of the
     GNU General Public License, as published by the Free Software
     Foundation (*note Copying::).


File: wget.info,  Node: Invoking,  Next: Recursive Retrieval,  Prev: Overview,  Up: Top

Invoking
********

   By default, Wget is very simple to invoke.  The basic syntax is:

     wget [OPTION]... [URL]...

   Wget will simply download all the URLs specified on the command
line.  URL is a "Uniform Resource Locator", as defined below.

   However, you may wish to change some of the default parameters of
Wget.  You can do it two ways: permanently, adding the appropriate
command to `.wgetrc' (*note Startup File::), or specifying it on the
command line.

* Menu:

* URL Format::
* Option Syntax::
* Basic Startup Options::
* Logging and Input File Options::
* Download Options::
* Directory Options::
* HTTP Options::
* FTP Options::
* Recursive Retrieval Options::
* Recursive Accept/Reject Options::


File: wget.info,  Node: URL Format,  Next: Option Syntax,  Prev: Invoking,  Up: Invoking

URL Format
==========

   "URL" is an acronym for Uniform Resource Locator.  A uniform
resource locator is a compact string representation for a resource
available via the Internet.  Wget recognizes the URL syntax as per
RFC1738.  This is the most widely used form (square brackets denote
optional parts):

     http://host[:port]/directory/file
     ftp://host[:port]/directory/file

   You can also encode your username and password within a URL:

     ftp://user:password@host/path
     http://user:password@host/path

   Either USER or PASSWORD, or both, may be left out.  If you leave out
either the HTTP username or password, no authentication will be sent.
If you leave out the FTP username, `anonymous' will be used.  If you
leave out the FTP password, your email address will be supplied as a
default password.(1)

   You can encode unsafe characters in a URL as `%xy', `xy' being the
hexadecimal representation of the character's ASCII value.  Some common
unsafe characters include `%' (quoted as `%25'), `:' (quoted as `%3A'),
and `@' (quoted as `%40').  Refer to RFC1738 for a comprehensive list
of unsafe characters.

   Wget also supports the `type' feature for FTP URLs.  By default, FTP
documents are retrieved in the binary mode (type `i'), which means that
they are downloaded unchanged.  Another useful mode is the `a'
("ASCII") mode, which converts the line delimiters between the
different operating systems, and is thus useful for text files.  Here
is an example:

     ftp://host/directory/file;type=a

   Two alternative variants of URL specification are also supported,
because of historical (hysterical?) reasons and their widespreaded use.

   FTP-only syntax (supported by `NcFTP'):
     host:/dir/file

   HTTP-only syntax (introduced by `Netscape'):
     host[:port]/dir/file

   These two alternative forms are deprecated, and may cease being
supported in the future.

   If you do not understand the difference between these notations, or
do not know which one to use, just use the plain ordinary format you use
with your favorite browser, like `Lynx' or `Netscape'.

   ---------- Footnotes ----------

   (1) If you have a `.netrc' file in your home directory, password
will also be searched for there.


File: wget.info,  Node: Option Syntax,  Next: Basic Startup Options,  Prev: URL Format,  Up: Invoking

Option Syntax
=============

   Since Wget uses GNU getopts to process its arguments, every option
has a short form and a long form.  Long options are more convenient to
remember, but take time to type.  You may freely mix different option
styles, or specify options after the command-line arguments.  Thus you
may write:

     wget -r --tries=10 http://fly.srk.fer.hr/ -o log

   The space between the option accepting an argument and the argument
may be omitted.  Instead `-o log' you can write `-olog'.

   You may put several options that do not require arguments together,
like:

     wget -drc URL

   This is a complete equivalent of:

     wget -d -r -c URL

   Since the options can be specified after the arguments, you may
terminate them with `--'.  So the following will try to download URL
`-x', reporting failure to `log':

     wget -o log -- -x

   The options that accept comma-separated lists all respect the
convention that specifying an empty list clears its value.  This can be
useful to clear the `.wgetrc' settings.  For instance, if your `.wgetrc'
sets `exclude_directories' to `/cgi-bin', the following example will
first reset it, and then set it to exclude `/~nobody' and `/~somebody'.
You can also clear the lists in `.wgetrc' (*note Wgetrc Syntax::).

     wget -X '' -X /~nobody,/~somebody


File: wget.info,  Node: Basic Startup Options,  Next: Logging and Input File Options,  Prev: Option Syntax,  Up: Invoking

Basic Startup Options
=====================

`-V'
`--version'
     Display the version of Wget.

`-h'
`--help'
     Print a help message describing all of Wget's command-line options.

`-b'
`--background'
     Go to background immediately after startup.  If no output file is
     specified via the `-o', output is redirected to `wget-log'.

`-e COMMAND'
`--execute COMMAND'
     Execute COMMAND as if it were a part of `.wgetrc' (*note Startup
     File::).  A command thus invoked will be executed _after_ the
     commands in `.wgetrc', thus taking precedence over them.


File: wget.info,  Node: Logging and Input File Options,  Next: Download Options,  Prev: Basic Startup Options,  Up: Invoking

Logging and Input File Options
==============================

`-o LOGFILE'
`--output-file=LOGFILE'
     Log all messages to LOGFILE.  The messages are normally reported
     to standard error.

`-a LOGFILE'
`--append-output=LOGFILE'
     Append to LOGFILE.  This is the same as `-o', only it appends to
     LOGFILE instead of overwriting the old log file.  If LOGFILE does
     not exist, a new file is created.

`-d'
`--debug'
     Turn on debug output, meaning various information important to the
     developers of Wget if it does not work properly.  Your system
     administrator may have chosen to compile Wget without debug
     support, in which case `-d' will not work.  Please note that
     compiling with debug support is always safe--Wget compiled with
     the debug support will _not_ print any debug info unless requested
     with `-d'.  *Note Reporting Bugs::, for more information on how to
     use `-d' for sending bug reports.

`-q'
`--quiet'
     Turn off Wget's output.

`-v'
`--verbose'
     Turn on verbose output, with all the available data.  The default
     output is verbose.

`-nv'
`--non-verbose'
     Non-verbose output--turn off verbose without being completely quiet
     (use `-q' for that), which means that error messages and basic
     information still get printed.

`-i FILE'
`--input-file=FILE'
     Read URLs from FILE, in which case no URLs need to be on the
     command line.  If there are URLs both on the command line and in
     an input file, those on the command lines will be the first ones to
     be retrieved.  The FILE need not be an HTML document (but no harm
     if it is)--it is enough if the URLs are just listed sequentially.

     However, if you specify `--force-html', the document will be
     regarded as `html'.  In that case you may have problems with
     relative links, which you can solve either by adding `<base
     href="URL">' to the documents or by specifying `--base=URL' on the
     command line.

`-F'
`--force-html'
     When input is read from a file, force it to be treated as an HTML
     file.  This enables you to retrieve relative links from existing
     HTML files on your local disk, by adding `<base href="URL">' to
     HTML, or using the `--base' command-line option.

`-B URL'
`--base=URL'
     When used in conjunction with `-F', prepends URL to relative links
     in the file specified by `-i'.


File: wget.info,  Node: Download Options,  Next: Directory Options,  Prev: Logging and Input File Options,  Up: Invoking

Download Options
================

`--bind-address=ADDRESS'
     When making client TCP/IP connections, `bind()' to ADDRESS on the
     local machine.  ADDRESS may be specified as a hostname or IP
     address.  This option can be useful if your machine is bound to
     multiple IPs.

`-t NUMBER'
`--tries=NUMBER'
     Set number of retries to NUMBER.  Specify 0 or `inf' for infinite
     retrying.

`-O FILE'
`--output-document=FILE'
     The documents will not be written to the appropriate files, but
     all will be concatenated together and written to FILE.  If FILE
     already exists, it will be overwritten.  If the FILE is `-', the
     documents will be written to standard output.  Including this
     option automatically sets the number of tries to 1.

`-nc'
`--no-clobber'
     If a file is downloaded more than once in the same directory,
     Wget's behavior depends on a few options, including `-nc'.  In
     certain cases, the local file will be "clobbered", or overwritten,
     upon repeated download.  In other cases it will be preserved.

     When running Wget without `-N', `-nc', or `-r', downloading the
     same file in the same directory will result in the original copy
     of FILE being preserved and the second copy being named `FILE.1'.
     If that file is downloaded yet again, the third copy will be named
     `FILE.2', and so on.  When `-nc' is specified, this behavior is
     suppressed, and Wget will refuse to download newer copies of
     `FILE'.  Therefore, "`no-clobber'" is actually a misnomer in this
     mode--it's not clobbering that's prevented (as the numeric
     suffixes were already preventing clobbering), but rather the
     multiple version saving that's prevented.

     When running Wget with `-r', but without `-N' or `-nc',
     re-downloading a file will result in the new copy simply
     overwriting the old.  Adding `-nc' will prevent this behavior,
     instead causing the original version to be preserved and any newer
     copies on the server to be ignored.

     When running Wget with `-N', with or without `-r', the decision as
     to whether or not to download a newer copy of a file depends on
     the local and remote timestamp and size of the file (*note
     Time-Stamping::).  `-nc' may not be specified at the same time as
     `-N'.

     Note that when `-nc' is specified, files with the suffixes `.html'
     or (yuck) `.htm' will be loaded from the local disk and parsed as
     if they had been retrieved from the Web.

`-c'
`--continue'
     Continue getting an existing file.  This is useful when you want to
     finish up the download started by another program, or a previous
     instance of Wget.  Thus you can write:

          wget -c ftp://sunsite.doc.ic.ac.uk/ls-lR.Z

     If there is a file name `ls-lR.Z' in the current directory, Wget
     will assume that it is the first portion of the remote file, and
     will require the server to continue the retrieval from an offset
     equal to the length of the local file.

     Note that you need not specify this option if all you want is Wget
     to continue retrieving where it left off when the connection is
     lost--Wget does this by default.  You need this option only when
     you want to continue retrieval of a file already halfway
     retrieved, saved by another FTP client, or left by Wget being
     killed.

     Without `-c', the previous example would just begin to download the
     remote file to `ls-lR.Z.1'.  The `-c' option is also applicable
     for HTTP servers that support the `Range' header.

     Note that if you use `-c' on a file that's already downloaded
     completely, `FILE' will not be changed, nor will a second `FILE.1'
     copy be created.

`--dot-style=STYLE'
     Set the retrieval style to STYLE.  Wget traces the retrieval of
     each document by printing dots on the screen, each dot
     representing a fixed amount of retrieved data.  Any number of dots
     may be separated in a "cluster", to make counting easier.  This
     option allows you to choose one of the pre-defined styles,
     determining the number of bytes represented by a dot, the number
     of dots in a cluster, and the number of dots on the line.

     With the `default' style each dot represents 1K, there are ten dots
     in a cluster and 50 dots in a line.  The `binary' style has a more
     "computer"-like orientation--8K dots, 16-dots clusters and 48 dots
     per line (which makes for 384K lines).  The `mega' style is
     suitable for downloading very large files--each dot represents 64K
     retrieved, there are eight dots in a cluster, and 48 dots on each
     line (so each line contains 3M).  The `micro' style is exactly the
     reverse; it is suitable for downloading small files, with 128-byte
     dots, 8 dots per cluster, and 48 dots (6K) per line.

`-N'
`--timestamping'
     Turn on time-stamping.  *Note Time-Stamping::, for details.

`-S'
`--server-response'
     Print the headers sent by HTTP servers and responses sent by FTP
     servers.

`--spider'
     When invoked with this option, Wget will behave as a Web "spider",
     which means that it will not download the pages, just check that
     they are there.  You can use it to check your bookmarks, e.g. with:

          wget --spider --force-html -i bookmarks.html

     This feature needs much more work for Wget to get close to the
     functionality of real WWW spiders.

`-T seconds'
`--timeout=SECONDS'
     Set the read timeout to SECONDS seconds.  Whenever a network read
     is issued, the file descriptor is checked for a timeout, which
     could otherwise leave a pending connection (uninterrupted read).
     The default timeout is 900 seconds (fifteen minutes).  Setting
     timeout to 0 will disable checking for timeouts.

     Please do not lower the default timeout value with this option
     unless you know what you are doing.

`-w SECONDS'
`--wait=SECONDS'
     Wait the specified number of seconds between the retrievals.  Use
     of this option is recommended, as it lightens the server load by
     making the requests less frequent.  Instead of in seconds, the
     time can be specified in minutes using the `m' suffix, in hours
     using `h' suffix, or in days using `d' suffix.

     Specifying a large value for this option is useful if the network
     or the destination host is down, so that Wget can wait long enough
     to reasonably expect the network error to be fixed before the
     retry.

`--waitretry=SECONDS'
     If you don't want Wget to wait between _every_ retrieval, but only
     between retries of failed downloads, you can use this option.
     Wget will use "linear backoff", waiting 1 second after the first
     failure on a given file, then waiting 2 seconds after the second
     failure on that file, up to the maximum number of SECONDS you
     specify.  Therefore, a value of 10 will actually make Wget wait up
     to (1 + 2 + ... + 10) = 55 seconds per file.

     Note that this option is turned on by default in the global
     `wgetrc' file.

`-Y on/off'
`--proxy=on/off'
     Turn proxy support on or off.  The proxy is on by default if the
     appropriate environmental variable is defined.

`-Q QUOTA'
`--quota=QUOTA'
     Specify download quota for automatic retrievals.  The value can be
     specified in bytes (default), kilobytes (with `k' suffix), or
     megabytes (with `m' suffix).

     Note that quota will never affect downloading a single file.  So
     if you specify `wget -Q10k ftp://wuarchive.wustl.edu/ls-lR.gz',
     all of the `ls-lR.gz' will be downloaded.  The same goes even when
     several URLs are specified on the command-line.  However, quota is
     respected when retrieving either recursively, or from an input
     file.  Thus you may safely type `wget -Q2m -i sites'--download
     will be aborted when the quota is exceeded.

     Setting quota to 0 or to `inf' unlimits the download quota.


File: wget.info,  Node: Directory Options,  Next: HTTP Options,  Prev: Download Options,  Up: Invoking

Directory Options
=================

`-nd'
`--no-directories'
     Do not create a hierarchy of directories when retrieving
     recursively.  With this option turned on, all files will get saved
     to the current directory, without clobbering (if a name shows up
     more than once, the filenames will get extensions `.n').

`-x'
`--force-directories'
     The opposite of `-nd'--create a hierarchy of directories, even if
     one would not have been created otherwise.  E.g. `wget -x
     http://fly.srk.fer.hr/robots.txt' will save the downloaded file to
     `fly.srk.fer.hr/robots.txt'.

`-nH'
`--no-host-directories'
     Disable generation of host-prefixed directories.  By default,
     invoking Wget with `-r http://fly.srk.fer.hr/' will create a
     structure of directories beginning with `fly.srk.fer.hr/'.  This
     option disables such behavior.

`--cut-dirs=NUMBER'
     Ignore NUMBER directory components.  This is useful for getting a
     fine-grained control over the directory where recursive retrieval
     will be saved.

     Take, for example, the directory at
     `ftp://ftp.xemacs.org/pub/xemacs/'.  If you retrieve it with `-r',
     it will be saved locally under `ftp.xemacs.org/pub/xemacs/'.
     While the `-nH' option can remove the `ftp.xemacs.org/' part, you
     are still stuck with `pub/xemacs'.  This is where `--cut-dirs'
     comes in handy; it makes Wget not "see" NUMBER remote directory
     components.  Here are several examples of how `--cut-dirs' option
     works.

          No options        -> ftp.xemacs.org/pub/xemacs/
          -nH               -> pub/xemacs/
          -nH --cut-dirs=1  -> xemacs/
          -nH --cut-dirs=2  -> .
          
          --cut-dirs=1      -> ftp.xemacs.org/xemacs/
          ...

     If you just want to get rid of the directory structure, this
     option is similar to a combination of `-nd' and `-P'.  However,
     unlike `-nd', `--cut-dirs' does not lose with subdirectories--for
     instance, with `-nH --cut-dirs=1', a `beta/' subdirectory will be
     placed to `xemacs/beta', as one would expect.

`-P PREFIX'
`--directory-prefix=PREFIX'
     Set directory prefix to PREFIX.  The "directory prefix" is the
     directory where all other files and subdirectories will be saved
     to, i.e. the top of the retrieval tree.  The default is `.' (the
     current directory).


File: wget.info,  Node: HTTP Options,  Next: FTP Options,  Prev: Directory Options,  Up: Invoking

HTTP Options
============

`-E'
`--html-extension'
     If a file of type `text/html' is downloaded and the URL does not
     end with the regexp `\.[Hh][Tt][Mm][Ll]?', this option will cause
     the suffix `.html' to be appended to the local filename.  This is
     useful, for instance, when you're mirroring a remote site that uses
     `.asp' pages, but you want the mirrored pages to be viewable on
     your stock Apache server.  Another good use for this is when you're
     downloading the output of CGIs.  A URL like
     `http://site.com/article.cgi?25' will be saved as
     `article.cgi?25.html'.

     Note that filenames changed in this way will be re-downloaded
     every time you re-mirror a site, because Wget can't tell that the
     local `X.html' file corresponds to remote URL `X' (since it
     doesn't yet know that the URL produces output of type `text/html'.
     To prevent this re-downloading, you must use `-k' and `-K' so
     that the original version of the file will be saved as `X.orig'
     (*note Recursive Retrieval Options::).

`--http-user=USER'
`--http-passwd=PASSWORD'
     Specify the username USER and password PASSWORD on an HTTP server.
     According to the type of the challenge, Wget will encode them
     using either the `basic' (insecure) or the `digest' authentication
     scheme.

     Another way to specify username and password is in the URL itself
     (*note URL Format::).  For more information about security issues
     with Wget, *Note Security Considerations::.

`-C on/off'
`--cache=on/off'
     When set to off, disable server-side cache.  In this case, Wget
     will send the remote server an appropriate directive (`Pragma:
     no-cache') to get the file from the remote service, rather than
     returning the cached version.  This is especially useful for
     retrieving and flushing out-of-date documents on proxy servers.

     Caching is allowed by default.

`--ignore-length'
     Unfortunately, some HTTP servers (CGI programs, to be more
     precise) send out bogus `Content-Length' headers, which makes Wget
     go wild, as it thinks not all the document was retrieved.  You can
     spot this syndrome if Wget retries getting the same document again
     and again, each time claiming that the (otherwise normal)
     connection has closed on the very same byte.

     With this option, Wget will ignore the `Content-Length' header--as
     if it never existed.

`--header=ADDITIONAL-HEADER'
     Define an ADDITIONAL-HEADER to be passed to the HTTP servers.
     Headers must contain a `:' preceded by one or more non-blank
     characters, and must not contain newlines.

     You may define more than one additional header by specifying
     `--header' more than once.

          wget --header='Accept-Charset: iso-8859-2' \
               --header='Accept-Language: hr'        \
                 http://fly.srk.fer.hr/

     Specification of an empty string as the header value will clear all
     previous user-defined headers.

`--proxy-user=USER'
`--proxy-passwd=PASSWORD'
     Specify the username USER and password PASSWORD for authentication
     on a proxy server.  Wget will encode them using the `basic'
     authentication scheme.

`--referer=URL'
     Include `Referer: URL' header in HTTP request.  Useful for
     retrieving documents with server-side processing that assume they
     are always being retrieved by interactive web browsers and only
     come out properly when Referer is set to one of the pages that
     point to them.

`-s'
`--save-headers'
     Save the headers sent by the HTTP server to the file, preceding the
     actual contents, with an empty line as the separator.

`-U AGENT-STRING'
`--user-agent=AGENT-STRING'
     Identify as AGENT-STRING to the HTTP server.

     The HTTP protocol allows the clients to identify themselves using a
     `User-Agent' header field.  This enables distinguishing the WWW
     software, usually for statistical purposes or for tracing of
     protocol violations.  Wget normally identifies as `Wget/VERSION',
     VERSION being the current version number of Wget.

     However, some sites have been known to impose the policy of
     tailoring the output according to the `User-Agent'-supplied
     information.  While conceptually this is not such a bad idea, it
     has been abused by servers denying information to clients other
     than `Mozilla' or Microsoft `Internet Explorer'.  This option
     allows you to change the `User-Agent' line issued by Wget.  Use of
     this option is discouraged, unless you really know what you are
     doing.


File: wget.info,  Node: FTP Options,  Next: Recursive Retrieval Options,  Prev: HTTP Options,  Up: Invoking

FTP Options
===========

`--retr-symlinks'
     Usually, when retrieving FTP directories recursively and a symbolic
     link is encountered, the linked-to file is not downloaded.
     Instead, a matching symbolic link is created on the local
     filesystem.  The pointed-to file will not be downloaded unless
     this recursive retrieval would have encountered it separately and
     downloaded it anyway.

     When `--retr-symlinks' is specified, however, symbolic links are
     traversed and the pointed-to files are retrieved.  At this time,
     this option does not cause Wget to traverse symlinks to
     directories and recurse through them, but in the future it should
     be enhanced to do this.

     Note that when retrieving a file (not a directory) because it was
     specified on the commandline, rather than because it was recursed
     to, this option has no effect.  Symbolic links are always
     traversed in this case.

`-g on/off'
`--glob=on/off'
     Turn FTP globbing on or off.  Globbing means you may use the
     shell-like special characters ("wildcards"), like `*', `?', `['
     and `]' to retrieve more than one file from the same directory at
     once, like:

          wget ftp://gnjilux.srk.fer.hr/*.msg

     By default, globbing will be turned on if the URL contains a
     globbing character.  This option may be used to turn globbing on
     or off permanently.

     You may have to quote the URL to protect it from being expanded by
     your shell.  Globbing makes Wget look for a directory listing,
     which is system-specific.  This is why it currently works only
     with Unix FTP servers (and the ones emulating Unix `ls' output).

`--passive-ftp'
     Use the "passive" FTP retrieval scheme, in which the client
     initiates the data connection.  This is sometimes required for FTP
     to work behind firewalls.


File: wget.info,  Node: Recursive Retrieval Options,  Next: Recursive Accept/Reject Options,  Prev: FTP Options,  Up: Invoking

Recursive Retrieval Options
===========================

`-r'
`--recursive'
     Turn on recursive retrieving.  *Note Recursive Retrieval::, for
     more details.

`-l DEPTH'
`--level=DEPTH'
     Specify recursion maximum depth level DEPTH (*note Recursive
     Retrieval::).  The default maximum depth is 5.

`--delete-after'
     This option tells Wget to delete every single file it downloads,
     _after_ having done so.  It is useful for pre-fetching popular
     pages through a proxy, e.g.:

          wget -r -nd --delete-after http://whatever.com/~popular/page/

     The `-r' option is to retrieve recursively, and `-nd' to not
     create directories.

     Note that `--delete-after' deletes files on the local machine.  It
     does not issue the `DELE' command to remote FTP sites, for
     instance.  Also note that when `--delete-after' is specified,
     `--convert-links' is ignored, so `.orig' files are simply not
     created in the first place.

`-k'
`--convert-links'
     Convert the non-relative links to relative ones locally.  Only the
     references to the documents actually downloaded will be converted;
     the rest will be left unchanged.

     Note that only at the end of the download can Wget know which
     links have been downloaded.  Because of that, much of the work
     done by `-k' will be performed at the end of the downloads.

`-K'
`--backup-converted'
     When converting a file, back up the original version with a `.orig'
     suffix.  Affects the behavior of `-N' (*note HTTP Time-Stamping
     Internals::).

`-m'
`--mirror'
     Turn on options suitable for mirroring.  This option turns on
     recursion and time-stamping, sets infinite recursion depth and
     keeps FTP directory listings.  It is currently equivalent to `-r
     -N -l inf -nr'.

`-nr'
`--dont-remove-listing'
     Don't remove the temporary `.listing' files generated by FTP
     retrievals.  Normally, these files contain the raw directory
     listings received from FTP servers.  Not removing them can be
     useful to access the full remote file list when running a mirror,
     or for debugging purposes.

`-p'
`--page-requisites'
     This option causes Wget to download all the files that are
     necessary to properly display a given HTML page.  This includes
     such things as inlined images, sounds, and referenced stylesheets.

     Ordinarily, when downloading a single HTML page, any requisite
     documents that may be needed to display it properly are not
     downloaded.  Using `-r' together with `-l' can help, but since
     Wget does not ordinarily distinguish between external and inlined
     documents, one is generally left with "leaf documents" that are
     missing their requisites.

     For instance, say document `1.html' contains an `<IMG>' tag
     referencing `1.gif' and an `<A>' tag pointing to external document
     `2.html'.  Say that `2.html' is the same but that its image is
     `2.gif' and it links to `3.html'.  Say this continues up to some
     arbitrarily high number.

     If one executes the command:

          wget -r -l 2 http://SITE/1.html

     then `1.html', `1.gif', `2.html', `2.gif', and `3.html' will be
     downloaded.  As you can see, `3.html' is without its requisite
     `3.gif' because Wget is simply counting the number of hops (up to
     2) away from `1.html' in order to determine where to stop the
     recursion.  However, with this command:

          wget -r -l 2 -p http://SITE/1.html

     all the above files _and_ `3.html''s requisite `3.gif' will be
     downloaded.  Similarly,

          wget -r -l 1 -p http://SITE/1.html

     will cause `1.html', `1.gif', `2.html', and `2.gif' to be
     downloaded.  One might think that:

          wget -r -l 0 -p http://SITE/1.html

     would download just `1.html' and `1.gif', but unfortunately this
     is not the case, because `-l 0' is equivalent to `-l inf'--that
     is, infinite recursion.  To download a single HTML page (or a
     handful of them, all specified on the commandline or in a `-i' URL
     input file) and its requisites, simply leave off `-p' and `-l':

          wget -p http://SITE/1.html

     Note that Wget will behave as if `-r' had been specified, but only
     that single page and its requisites will be downloaded.  Links
     from that page to external documents will not be followed.
     Actually, to download a single page and all its requisites (even
     if they exist on separate websites), and make sure the lot
     displays properly locally, this author likes to use a few options
     in addition to `-p':

          wget -E -H -k -K -nh -p http://SITE/DOCUMENT

     To finish off this topic, it's worth knowing that Wget's idea of an
     external document link is any URL specified in an `<A>' tag, an
     `<AREA>' tag, or a `<LINK>' tag other than `<LINK
     REL="stylesheet">'.


File: wget.info,  Node: Recursive Accept/Reject Options,  Prev: Recursive Retrieval Options,  Up: Invoking

Recursive Accept/Reject Options
===============================

`-A ACCLIST --accept ACCLIST'
`-R REJLIST --reject REJLIST'
     Specify comma-separated lists of file name suffixes or patterns to
     accept or reject (*note Types of Files:: for more details).

`-D DOMAIN-LIST'
`--domains=DOMAIN-LIST'
     Set domains to be accepted and DNS looked-up, where DOMAIN-LIST is
     a comma-separated list.  Note that it does _not_ turn on `-H'.
     This option speeds things up, even if only one host is spanned
     (*note Domain Acceptance::).

`--exclude-domains DOMAIN-LIST'
     Exclude the domains given in a comma-separated DOMAIN-LIST from
     DNS-lookup (*note Domain Acceptance::).

`--follow-ftp'
     Follow FTP links from HTML documents.  Without this option, Wget
     will ignore all the FTP links.

`--follow-tags=LIST'
     Wget has an internal table of HTML tag / attribute pairs that it
     considers when looking for linked documents during a recursive
     retrieval.  If a user wants only a subset of those tags to be
     considered, however, he or she should be specify such tags in a
     comma-separated LIST with this option.

`-G LIST'
`--ignore-tags=LIST'
     This is the opposite of the `--follow-tags' option.  To skip
     certain HTML tags when recursively looking for documents to
     download, specify them in a comma-separated LIST.

     In the past, the `-G' option was the best bet for downloading a
     single page and its requisites, using a commandline like:

          wget -Ga,area -H -k -K -nh -r http://SITE/DOCUMENT

     However, the author of this option came across a page with tags
     like `<LINK REL="home" HREF="/">' and came to the realization that
     `-G' was not enough.  One can't just tell Wget to ignore `<LINK>',
     because then stylesheets will not be downloaded.  Now the best bet
     for downloading a single page and its requisites is the dedicated
     `--page-requisites' option.

`-H'
`--span-hosts'
     Enable spanning across hosts when doing recursive retrieving
     (*note All Hosts::).

`-L'
`--relative'
     Follow relative links only.  Useful for retrieving a specific home
     page without any distractions, not even those from the same hosts
     (*note Relative Links::).

`-I LIST'
`--include-directories=LIST'
     Specify a comma-separated list of directories you wish to follow
     when downloading (*note Directory-Based Limits:: for more
     details.)  Elements of LIST may contain wildcards.

`-X LIST'
`--exclude-directories=LIST'
     Specify a comma-separated list of directories you wish to exclude
     from download (*note Directory-Based Limits:: for more details.)
     Elements of LIST may contain wildcards.

`-nh'
`--no-host-lookup'
     Disable the time-consuming DNS lookup of almost all hosts (*note
     Host Checking::).

`-np'

`--no-parent'
     Do not ever ascend to the parent directory when retrieving
     recursively.  This is a useful option, since it guarantees that
     only the files _below_ a certain hierarchy will be downloaded.
     *Note Directory-Based Limits::, for more details.


File: wget.info,  Node: Recursive Retrieval,  Next: Following Links,  Prev: Invoking,  Up: Top

Recursive Retrieval
*******************

   GNU Wget is capable of traversing parts of the Web (or a single HTTP
or FTP server), depth-first following links and directory structure.
This is called "recursive" retrieving, or "recursion".

   With HTTP URLs, Wget retrieves and parses the HTML from the given
URL, documents, retrieving the files the HTML document was referring
to, through markups like `href', or `src'.  If the freshly downloaded
file is also of type `text/html', it will be parsed and followed
further.

   The maximum "depth" to which the retrieval may descend is specified
with the `-l' option (the default maximum depth is five layers).  *Note
Recursive Retrieval::.

   When retrieving an FTP URL recursively, Wget will retrieve all the
data from the given directory tree (including the subdirectories up to
the specified depth) on the remote server, creating its mirror image
locally.  FTP retrieval is also limited by the `depth' parameter.

   By default, Wget will create a local directory tree, corresponding to
the one found on the remote server.

   Recursive retrieving can find a number of applications, the most
important of which is mirroring.  It is also useful for WWW
presentations, and any other opportunities where slow network
connections should be bypassed by storing the files locally.

   You should be warned that invoking recursion may cause grave
overloading on your system, because of the fast exchange of data
through the network; all of this may hamper other users' work.  The
same stands for the foreign server you are mirroring--the more requests
it gets in a rows, the greater is its load.

   Careless retrieving can also fill your file system uncontrollably,
which can grind the machine to a halt.

   The load can be minimized by lowering the maximum recursion level
(`-l') and/or by lowering the number of retries (`-t').  You may also
consider using the `-w' option to slow down your requests to the remote
servers, as well as the numerous options to narrow the number of
followed links (*note Following Links::).

   Recursive retrieval is a good thing when used properly.  Please take
all precautions not to wreak havoc through carelessness.


File: wget.info,  Node: Following Links,  Next: Time-Stamping,  Prev: Recursive Retrieval,  Up: Top

Following Links
***************

   When retrieving recursively, one does not wish to retrieve loads of
unnecessary data.  Most of the time the users bear in mind exactly what
they want to download, and want Wget to follow only specific links.

   For example, if you wish to download the music archive from
`fly.srk.fer.hr', you will not want to download all the home pages that
happen to be referenced by an obscure part of the archive.

   Wget possesses several mechanisms that allows you to fine-tune which
links it will follow.

* Menu:

* Relative Links::         Follow relative links only.
* Host Checking::          Follow links on the same host.
* Domain Acceptance::      Check on a list of domains.
* All Hosts::              No host restrictions.
* Types of Files::         Getting only certain files.
* Directory-Based Limits:: Getting only certain directories.
* FTP Links::              Following FTP links.


File: wget.info,  Node: Relative Links,  Next: Host Checking,  Prev: Following Links,  Up: Following Links

Relative Links
==============

   When only relative links are followed (option `-L'), recursive
retrieving will never span hosts.  No time-expensive DNS-lookups will
be performed, and the process will be very fast, with the minimum
strain of the network.  This will suit your needs often, especially when
mirroring the output of various `x2html' converters, since they
generally output relative links.


File: wget.info,  Node: Host Checking,  Next: Domain Acceptance,  Prev: Relative Links,  Up: Following Links

Host Checking
=============

   The drawback of following the relative links solely is that humans
often tend to mix them with absolute links to the very same host, and
the very same page.  In this mode (which is the default mode for
following links) all URLs that refer to the same host will be retrieved.

   The problem with this option are the aliases of the hosts and
domains.  Thus there is no way for Wget to know that `regoc.srce.hr' and
`www.srce.hr' are the same host, or that `fly.srk.fer.hr' is the same
as `fly.cc.fer.hr'.  Whenever an absolute link is encountered, the host
is DNS-looked-up with `gethostbyname' to check whether we are maybe
dealing with the same hosts.  Although the results of `gethostbyname'
are cached, it is still a great slowdown, e.g. when dealing with large
indices of home pages on different hosts (because each of the hosts
must be DNS-resolved to see whether it just _might_ be an alias of the
starting host).

   To avoid the overhead you may use `-nh', which will turn off
DNS-resolving and make Wget compare hosts literally.  This will make
things run much faster, but also much less reliable (e.g. `www.srce.hr'
and `regoc.srce.hr' will be flagged as different hosts).

   Note that modern HTTP servers allow one IP address to host several
"virtual servers", each having its own directory hierarchy.  Such
"servers" are distinguished by their hostnames (all of which point to
the same IP address); for this to work, a client must send a `Host'
header, which is what Wget does.  However, in that case Wget _must not_
try to divine a host's "real" address, nor try to use the same hostname
for each access, i.e. `-nh' must be turned on.

   In other words, the `-nh' option must be used to enable the
retrieval from virtual servers distinguished by their hostnames.  As the
number of such server setups grow, the behavior of `-nh' may become the
default in the future.


File: wget.info,  Node: Domain Acceptance,  Next: All Hosts,  Prev: Host Checking,  Up: Following Links

Domain Acceptance
=================

   With the `-D' option you may specify the domains that will be
followed.  The hosts the domain of which is not in this list will not be
DNS-resolved.  Thus you can specify `-Dmit.edu' just to make sure that
*nothing outside of MIT gets looked up*.  This is very important and
useful.  It also means that `-D' does _not_ imply `-H' (span all
hosts), which must be specified explicitly.  Feel free to use this
options since it will speed things up, with almost all the reliability
of checking for all hosts.  Thus you could invoke

     wget -r -D.hr http://fly.srk.fer.hr/

   to make sure that only the hosts in `.hr' domain get DNS-looked-up
for being equal to `fly.srk.fer.hr'.  So `fly.cc.fer.hr' will be
checked (only once!) and found equal, but `www.gnu.ai.mit.edu' will not
even be checked.

   Of course, domain acceptance can be used to limit the retrieval to
particular domains with spanning of hosts in them, but then you must
specify `-H' explicitly.  E.g.:

     wget -r -H -Dmit.edu,stanford.edu http://www.mit.edu/

   will start with `http://www.mit.edu/', following links across MIT
and Stanford.

   If there are domains you want to exclude specifically, you can do it
with `--exclude-domains', which accepts the same type of arguments of
`-D', but will _exclude_ all the listed domains.  For example, if you
want to download all the hosts from `foo.edu' domain, with the
exception of `sunsite.foo.edu', you can do it like this:

     wget -rH -Dfoo.edu --exclude-domains sunsite.foo.edu http://www.foo.edu/


File: wget.info,  Node: All Hosts,  Next: Types of Files,  Prev: Domain Acceptance,  Up: Following Links

All Hosts
=========

   When `-H' is specified without `-D', all hosts are freely spanned.
There are no restrictions whatsoever as to what part of the net Wget
will go to fetch documents, other than maximum retrieval depth.  If a
page references `www.yahoo.com', so be it.  Such an option is rarely
useful for itself.


File: wget.info,  Node: Types of Files,  Next: Directory-Based Limits,  Prev: All Hosts,  Up: Following Links

Types of Files
==============

   When downloading material from the web, you will often want to
restrict the retrieval to only certain file types.  For example, if you
are interested in downloading GIFs, you will not be overjoyed to get
loads of PostScript documents, and vice versa.

   Wget offers two options to deal with this problem.  Each option
description lists a short name, a long name, and the equivalent command
in `.wgetrc'.

`-A ACCLIST'
`--accept ACCLIST'
`accept = ACCLIST'
     The argument to `--accept' option is a list of file suffixes or
     patterns that Wget will download during recursive retrieval.  A
     suffix is the ending part of a file, and consists of "normal"
     letters, e.g. `gif' or `.jpg'.  A matching pattern contains
     shell-like wildcards, e.g. `books*' or `zelazny*196[0-9]*'.

     So, specifying `wget -A gif,jpg' will make Wget download only the
     files ending with `gif' or `jpg', i.e. GIFs and JPEGs.  On the
     other hand, `wget -A "zelazny*196[0-9]*"' will download only files
     beginning with `zelazny' and containing numbers from 1960 to 1969
     anywhere within.  Look up the manual of your shell for a
     description of how pattern matching works.

     Of course, any number of suffixes and patterns can be combined
     into a comma-separated list, and given as an argument to `-A'.

`-R REJLIST'
`--reject REJLIST'
`reject = REJLIST'
     The `--reject' option works the same way as `--accept', only its
     logic is the reverse; Wget will download all files _except_ the
     ones matching the suffixes (or patterns) in the list.

     So, if you want to download a whole page except for the cumbersome
     MPEGs and .AU files, you can use `wget -R mpg,mpeg,au'.
     Analogously, to download all files except the ones beginning with
     `bjork', use `wget -R "bjork*"'.  The quotes are to prevent
     expansion by the shell.

   The `-A' and `-R' options may be combined to achieve even better
fine-tuning of which files to retrieve.  E.g. `wget -A "*zelazny*" -R
.ps' will download all the files having `zelazny' as a part of their
name, but _not_ the PostScript files.

   Note that these two options do not affect the downloading of HTML
files; Wget must load all the HTMLs to know where to go at
all--recursive retrieval would make no sense otherwise.


File: wget.info,  Node: Directory-Based Limits,  Next: FTP Links,  Prev: Types of Files,  Up: Following Links

Directory-Based Limits
======================

   Regardless of other link-following facilities, it is often useful to
place the restriction of what files to retrieve based on the directories
those files are placed in.  There can be many reasons for this--the
home pages may be organized in a reasonable directory structure; or some
directories may contain useless information, e.g. `/cgi-bin' or `/dev'
directories.

   Wget offers three different options to deal with this requirement.
Each option description lists a short name, a long name, and the
equivalent command in `.wgetrc'.

`-I LIST'
`--include LIST'
`include_directories = LIST'
     `-I' option accepts a comma-separated list of directories included
     in the retrieval.  Any other directories will simply be ignored.
     The directories are absolute paths.

     So, if you wish to download from `http://host/people/bozo/'
     following only links to bozo's colleagues in the `/people'
     directory and the bogus scripts in `/cgi-bin', you can specify:

          wget -I /people,/cgi-bin http://host/people/bozo/

`-X LIST'
`--exclude LIST'
`exclude_directories = LIST'
     `-X' option is exactly the reverse of `-I'--this is a list of
     directories _excluded_ from the download.  E.g. if you do not want
     Wget to download things from `/cgi-bin' directory, specify `-X
     /cgi-bin' on the command line.

     The same as with `-A'/`-R', these two options can be combined to
     get a better fine-tuning of downloading subdirectories.  E.g. if
     you want to load all the files from `/pub' hierarchy except for
     `/pub/worthless', specify `-I/pub -X/pub/worthless'.

`-np'
`--no-parent'
`no_parent = on'
     The simplest, and often very useful way of limiting directories is
     disallowing retrieval of the links that refer to the hierarchy
     "above" than the beginning directory, i.e. disallowing ascent to
     the parent directory/directories.

     The `--no-parent' option (short `-np') is useful in this case.
     Using it guarantees that you will never leave the existing
     hierarchy.  Supposing you issue Wget with:

          wget -r --no-parent http://somehost/~luzer/my-archive/

     You may rest assured that none of the references to
     `/~his-girls-homepage/' or `/~luzer/all-my-mpegs/' will be
     followed.  Only the archive you are interested in will be
     downloaded.  Essentially, `--no-parent' is similar to
     `-I/~luzer/my-archive', only it handles redirections in a more
     intelligent fashion.


File: wget.info,  Node: FTP Links,  Prev: Directory-Based Limits,  Up: Following Links

Following FTP Links
===================

   The rules for FTP are somewhat specific, as it is necessary for them
to be.  FTP links in HTML documents are often included for purposes of
reference, and it is often inconvenient to download them by default.

   To have FTP links followed from HTML documents, you need to specify
the `--follow-ftp' option.  Having done that, FTP links will span hosts
regardless of `-H' setting.  This is logical, as FTP links rarely point
to the same host where the HTTP server resides.  For similar reasons,
the `-L' options has no effect on such downloads.  On the other hand,
domain acceptance (`-D') and suffix rules (`-A' and `-R') apply
normally.

   Also note that followed links to FTP directories will not be
retrieved recursively further.


File: wget.info,  Node: Time-Stamping,  Next: Startup File,  Prev: Following Links,  Up: Top

Time-Stamping
*************

   One of the most important aspects of mirroring information from the
Internet is updating your archives.

   Downloading the whole archive again and again, just to replace a few
changed files is expensive, both in terms of wasted bandwidth and money,
and the time to do the update.  This is why all the mirroring tools
offer the option of incremental updating.

   Such an updating mechanism means that the remote server is scanned in
search of "new" files.  Only those new files will be downloaded in the
place of the old ones.

   A file is considered new if one of these two conditions are met:

  1. A file of that name does not already exist locally.

  2. A file of that name does exist, but the remote file was modified
     more recently than the local file.

   To implement this, the program needs to be aware of the time of last
modification of both remote and local files.  Such information are
called the "time-stamps".

   The time-stamping in GNU Wget is turned on using `--timestamping'
(`-N') option, or through `timestamping = on' directive in `.wgetrc'.
With this option, for each file it intends to download, Wget will check
whether a local file of the same name exists.  If it does, and the
remote file is older, Wget will not download it.

   If the local file does not exist, or the sizes of the files do not
match, Wget will download the remote file no matter what the time-stamps
say.

* Menu:

* Time-Stamping Usage::
* HTTP Time-Stamping Internals::
* FTP Time-Stamping Internals::


File: wget.info,  Node: Time-Stamping Usage,  Next: HTTP Time-Stamping Internals,  Prev: Time-Stamping,  Up: Time-Stamping

Time-Stamping Usage
===================

   The usage of time-stamping is simple.  Say you would like to
download a file so that it keeps its date of modification.

     wget -S http://www.gnu.ai.mit.edu/

   A simple `ls -l' shows that the time stamp on the local file equals
the state of the `Last-Modified' header, as returned by the server.  As
you can see, the time-stamping info is preserved locally, even without
`-N'.

   Several days later, you would like Wget to check if the remote file
has changed, and download it if it has.

     wget -N http://www.gnu.ai.mit.edu/

   Wget will ask the server for the last-modified date.  If the local
file is newer, the remote file will not be re-fetched.  However, if the
remote file is more recent, Wget will proceed fetching it normally.

   The same goes for FTP.  For example:

     wget ftp://ftp.ifi.uio.no/pub/emacs/gnus/*

   `ls' will show that the timestamps are set according to the state on
the remote server.  Reissuing the command with `-N' will make Wget
re-fetch _only_ the files that have been modified.

   In both HTTP and FTP retrieval Wget will time-stamp the local file
correctly (with or without `-N') if it gets the stamps, i.e. gets the
directory listing for FTP or the `Last-Modified' header for HTTP.

   If you wished to mirror the GNU archive every week, you would use the
following command every week:

     wget --timestamping -r ftp://prep.ai.mit.edu/pub/gnu/


File: wget.info,  Node: HTTP Time-Stamping Internals,  Next: FTP Time-Stamping Internals,  Prev: Time-Stamping Usage,  Up: Time-Stamping

HTTP Time-Stamping Internals
============================

   Time-stamping in HTTP is implemented by checking of the
`Last-Modified' header.  If you wish to retrieve the file `foo.html'
through HTTP, Wget will check whether `foo.html' exists locally.  If it
doesn't, `foo.html' will be retrieved unconditionally.

   If the file does exist locally, Wget will first check its local
time-stamp (similar to the way `ls -l' checks it), and then send a
`HEAD' request to the remote server, demanding the information on the
remote file.

   The `Last-Modified' header is examined to find which file was
modified more recently (which makes it "newer").  If the remote file is
newer, it will be downloaded; if it is older, Wget will give up.(1)

   When `--backup-converted' (`-K') is specified in conjunction with
`-N', server file `X' is compared to local file `X.orig', if extant,
rather than being compared to local file `X', which will always differ
if it's been converted by `--convert-links' (`-k').

   Arguably, HTTP time-stamping should be implemented using the
`If-Modified-Since' request.

   ---------- Footnotes ----------

   (1) As an additional check, Wget will look at the `Content-Length'
header, and compare the sizes; if they are not the same, the remote
file will be downloaded no matter what the time-stamp says.


File: wget.info,  Node: FTP Time-Stamping Internals,  Prev: HTTP Time-Stamping Internals,  Up: Time-Stamping

FTP Time-Stamping Internals
===========================

   In theory, FTP time-stamping works much the same as HTTP, only FTP
has no headers--time-stamps must be received from the directory
listings.

   For each directory files must be retrieved from, Wget will use the
`LIST' command to get the listing.  It will try to analyze the listing,
assuming that it is a Unix `ls -l' listing, and extract the
time-stamps.  The rest is exactly the same as for HTTP.

   Assumption that every directory listing is a Unix-style listing may
sound extremely constraining, but in practice it is not, as many
non-Unix FTP servers use the Unixoid listing format because most (all?)
of the clients understand it.  Bear in mind that RFC959 defines no
standard way to get a file list, let alone the time-stamps.  We can
only hope that a future standard will define this.

   Another non-standard solution includes the use of `MDTM' command
that is supported by some FTP servers (including the popular
`wu-ftpd'), which returns the exact time of the specified file.  Wget
may support this command in the future.


File: wget.info,  Node: Startup File,  Next: Examples,  Prev: Time-Stamping,  Up: Top

Startup File
************

   Once you know how to change default settings of Wget through command
line arguments, you may wish to make some of those settings permanent.
You can do that in a convenient way by creating the Wget startup
file--`.wgetrc'.

   Besides `.wgetrc' is the "main" initialization file, it is
convenient to have a special facility for storing passwords.  Thus Wget
reads and interprets the contents of `$HOME/.netrc', if it finds it.
You can find `.netrc' format in your system manuals.

   Wget reads `.wgetrc' upon startup, recognizing a limited set of
commands.

* Menu:

* Wgetrc Location::   Location of various wgetrc files.
* Wgetrc Syntax::     Syntax of wgetrc.
* Wgetrc Commands::   List of available commands.
* Sample Wgetrc::     A wgetrc example.


File: wget.info,  Node: Wgetrc Location,  Next: Wgetrc Syntax,  Prev: Startup File,  Up: Startup File

Wgetrc Location
===============

   When initializing, Wget will look for a "global" startup file,
`/etc/wgetrc' by default (or some prefix other than `/usr/local', if
Wget was not installed there) and read commands from there, if it
exists.

   Then it will look for the user's file.  If the environmental variable
`WGETRC' is set, Wget will try to load that file.  Failing that, no
further attempts will be made.

   If `WGETRC' is not set, Wget will try to load `$HOME/.wgetrc'.

   The fact that user's settings are loaded after the system-wide ones
means that in case of collision user's wgetrc _overrides_ the
system-wide wgetrc (in `/etc/wgetrc' by default).  Fascist admins, away!


File: wget.info,  Node: Wgetrc Syntax,  Next: Wgetrc Commands,  Prev: Wgetrc Location,  Up: Startup File

Wgetrc Syntax
=============

   The syntax of a wgetrc command is simple:

     variable = value

   The "variable" will also be called "command".  Valid "values" are
different for different commands.

   The commands are case-insensitive and underscore-insensitive.  Thus
`DIr__PrefiX' is the same as `dirprefix'.  Empty lines, lines beginning
with `#' and lines containing white-space only are discarded.

   Commands that expect a comma-separated list will clear the list on an
empty command.  So, if you wish to reset the rejection list specified in
global `wgetrc', you can do it with:

     reject =


File: wget.info,  Node: Wgetrc Commands,  Next: Sample Wgetrc,  Prev: Wgetrc Syntax,  Up: Startup File

Wgetrc Commands
===============

   The complete set of commands is listed below.  Legal values are
listed after the `='.  Simple Boolean values can be set or unset using
`on' and `off' or `1' and `0'.  A fancier kind of Boolean allowed in
some cases is the "lockable Boolean", which may be set to `on', `off',
`always', or `never'.  If an option is set to `always' or `never', that
value will be locked in for the duration of the Wget
invocation--commandline options will not override.

   Some commands take pseudo-arbitrary values.  ADDRESS values can be
hostnames or dotted-quad IP addresses.  N can be any positive integer,
or `inf' for infinity, where appropriate.  STRING values can be any
non-empty string.

   Most of these commands have commandline equivalents (*note
Invoking::), though some of the more obscure or rarely used ones do not.

accept/reject = STRING
     Same as `-A'/`-R' (*note Types of Files::).

add_hostdir = on/off
     Enable/disable host-prefixed file names.  `-nH' disables it.

continue = on/off
     Enable/disable continuation of the retrieval--the same as `-c'
     (which enables it).

background = on/off
     Enable/disable going to background--the same as `-b' (which
     enables it).

backup_converted = on/off
     Enable/disable saving pre-converted files with the suffix
     `.orig'--the same as `-K' (which enables it).

base = STRING
     Consider relative URLs in URL input files forced to be interpreted
     as HTML as being relative to STRING--the same as `-B'.

bind_address = ADDRESS
     Bind to ADDRESS, like the `--bind-address' option.

cache = on/off
     When set to off, disallow server-caching.  See the `-C' option.

convert links = on/off
     Convert non-relative links locally.  The same as `-k'.

cut_dirs = N
     Ignore N remote directory components.

debug = on/off
     Debug mode, same as `-d'.

delete_after = on/off
     Delete after download--the same as `--delete-after'.

dir_prefix = STRING
     Top of directory tree--the same as `-P'.

dirstruct = on/off
     Turning dirstruct on or off--the same as `-x' or `-nd',
     respectively.

domains = STRING
     Same as `-D' (*note Domain Acceptance::).

dot_bytes = N
     Specify the number of bytes "contained" in a dot, as seen
     throughout the retrieval (1024 by default).  You can postfix the
     value with `k' or `m', representing kilobytes and megabytes,
     respectively.  With dot settings you can tailor the dot retrieval
     to suit your needs, or you can use the predefined "styles" (*note
     Download Options::).

dots_in_line = N
     Specify the number of dots that will be printed in each line
     throughout the retrieval (50 by default).

dot_spacing = N
     Specify the number of dots in a single cluster (10 by default).

dot_style = STRING
     Specify the dot retrieval "style", as with `--dot-style'.

exclude_directories = STRING
     Specify a comma-separated list of directories you wish to exclude
     from download--the same as `-X' (*note Directory-Based Limits::).

exclude_domains = STRING
     Same as `--exclude-domains' (*note Domain Acceptance::).

follow_ftp = on/off
     Follow FTP links from HTML documents--the same as `-f'.

follow_tags = STRING
     Only follow certain HTML tags when doing a recursive retrieval,
     just like `--follow-tags'.

force_html = on/off
     If set to on, force the input filename to be regarded as an HTML
     document--the same as `-F'.

ftp_proxy = STRING
     Use STRING as FTP proxy, instead of the one specified in
     environment.

glob = on/off
     Turn globbing on/off--the same as `-g'.

header = STRING
     Define an additional header, like `--header'.

html_extension = on/off
     Add a `.html' extension to `text/html' files without it, like `-E'.

http_passwd = STRING
     Set HTTP password.

http_proxy = STRING
     Use STRING as HTTP proxy, instead of the one specified in
     environment.

http_user = STRING
     Set HTTP user to STRING.

ignore_length = on/off
     When set to on, ignore `Content-Length' header; the same as
     `--ignore-length'.

ignore_tags = STRING
     Ignore certain HTML tags when doing a recursive retrieval, just
     like `-G' / `--ignore-tags'.

include_directories = STRING
     Specify a comma-separated list of directories you wish to follow
     when downloading--the same as `-I'.

input = STRING
     Read the URLs from STRING, like `-i'.

kill_longer = on/off
     Consider data longer than specified in content-length header as
     invalid (and retry getting it).  The default behaviour is to save
     as much data as there is, provided there is more than or equal to
     the value in `Content-Length'.

logfile = STRING
     Set logfile--the same as `-o'.

login = STRING
     Your user name on the remote machine, for FTP.  Defaults to
     `anonymous'.

mirror = on/off
     Turn mirroring on/off.  The same as `-m'.

netrc = on/off
     Turn reading netrc on or off.

noclobber = on/off
     Same as `-nc'.

no_parent = on/off
     Disallow retrieving outside the directory hierarchy, like
     `--no-parent' (*note Directory-Based Limits::).

no_proxy = STRING
     Use STRING as the comma-separated list of domains to avoid in
     proxy loading, instead of the one specified in environment.

output_document = STRING
     Set the output filename--the same as `-O'.

page_requisites = on/off
     Download all ancillary documents necessary for a single HTML page
     to display properly--the same as `-p'.

passive_ftp = on/off/always/never
     Set passive FTP--the same as `--passive-ftp'.  Some scripts and
     `.pm' (Perl module) files download files using `wget
     --passive-ftp'.  If your firewall does not allow this, you can set
     `passive_ftp = never' to override the commandline.

passwd = STRING
     Set your FTP password to PASSWORD.  Without this setting, the
     password defaults to `username@hostname.domainname'.

proxy_user = STRING
     Set proxy authentication user name to STRING, like `--proxy-user'.

proxy_passwd = STRING
     Set proxy authentication password to STRING, like `--proxy-passwd'.

referer = STRING
     Set HTTP `Referer:' header just like `--referer'.  (Note it was
     the folks who wrote the HTTP spec who got the spelling of
     "referrer" wrong.)

quiet = on/off
     Quiet mode--the same as `-q'.

quota = QUOTA
     Specify the download quota, which is useful to put in the global
     `wgetrc'.  When download quota is specified, Wget will stop
     retrieving after the download sum has become greater than quota.
     The quota can be specified in bytes (default), kbytes `k'
     appended) or mbytes (`m' appended).  Thus `quota = 5m' will set
     the quota to 5 mbytes.  Note that the user's startup file
     overrides system settings.

reclevel = N
     Recursion level--the same as `-l'.

recursive = on/off
     Recursive on/off--the same as `-r'.

relative_only = on/off
     Follow only relative links--the same as `-L' (*note Relative
     Links::).

remove_listing = on/off
     If set to on, remove FTP listings downloaded by Wget.  Setting it
     to off is the same as `-nr'.

retr_symlinks = on/off
     When set to on, retrieve symbolic links as if they were plain
     files; the same as `--retr-symlinks'.

robots = on/off
     Use (or not) `/robots.txt' file (*note Robots::).  Be sure to know
     what you are doing before changing the default (which is `on').

server_response = on/off
     Choose whether or not to print the HTTP and FTP server
     responses--the same as `-S'.

simple_host_check = on/off
     Same as `-nh' (*note Host Checking::).

span_hosts = on/off
     Same as `-H'.

timeout = N
     Set timeout value--the same as `-T'.

timestamping = on/off
     Turn timestamping on/off.  The same as `-N' (*note
     Time-Stamping::).

tries = N
     Set number of retries per URL--the same as `-t'.

use_proxy = on/off
     Turn proxy support on/off.  The same as `-Y'.

verbose = on/off
     Turn verbose on/off--the same as `-v'/`-nv'.

wait = N
     Wait N seconds between retrievals--the same as `-w'.

waitretry = N
     Wait up to N seconds between retries of failed retrievals
     only--the same as `--waitretry'.  Note that this is turned on by
     default in the global `wgetrc'.


File: wget.info,  Node: Sample Wgetrc,  Prev: Wgetrc Commands,  Up: Startup File

Sample Wgetrc
=============

   This is the sample initialization file, as given in the distribution.
It is divided in two section--one for global usage (suitable for global
startup file), and one for local usage (suitable for `$HOME/.wgetrc').
Be careful about the things you change.

   Note that almost all the lines are commented out.  For a command to
have any effect, you must remove the `#' character at the beginning of
its line.

     ###
     ### Sample Wget initialization file .wgetrc
     ###
     
     ## You can use this file to change the default behaviour of wget or to
     ## avoid having to type many many command-line options. This file does
     ## not contain a comprehensive list of commands -- look at the manual
     ## to find out what you can put into this file.
     ##
     ## Wget initialization file can reside in /etc/wgetrc
     ## (global, for all users) or $HOME/.wgetrc (for a single user).
     ##
     ## To use the settings in this file, you will have to uncomment them,
     ## as well as change them, in most cases, as the values on the
     ## commented-out lines are the default values (e.g. "off").
     
     
     ##
     ## Global settings (useful for setting up in /etc/wgetrc).
     ## Think well before you change them, since they may reduce wget's
     ## functionality, and make it behave contrary to the documentation:
     ##
     
     # You can set retrieve quota for beginners by specifying a value
     # optionally followed by 'K' (kilobytes) or 'M' (megabytes).  The
     # default quota is unlimited.
     #quota = inf
     
     # You can lower (or raise) the default number of retries when
     # downloading a file (default is 20).
     #tries = 20
     
     # Lowering the maximum depth of the recursive retrieval is handy to
     # prevent newbies from going too "deep" when they unwittingly start
     # the recursive retrieval.  The default is 5.
     #reclevel = 5
     
     # Many sites are behind firewalls that do not allow initiation of
     # connections from the outside.  On these sites you have to use the
     # `passive' feature of FTP.  If you are behind such a firewall, you
     # can turn this on to make Wget use passive FTP by default.
     #passive_ftp = off
     
     # The "wait" command below makes Wget wait between every connection.
     # If, instead, you want Wget to wait only between retries of failed
     # downloads, set waitretry to maximum number of seconds to wait (Wget
     # will use "linear backoff", waiting 1 second after the first failure
     # on a file, 2 seconds after the second failure, etc. up to this max).
     waitretry = 10
     
     
     ##
     ## Local settings (for a user to set in his $HOME/.wgetrc).  It is
     ## *highly* undesirable to put these settings in the global file, since
     ## they are potentially dangerous to "normal" users.
     ##
     ## Even when setting up your own ~/.wgetrc, you should know what you
     ## are doing before doing so.
     ##
     
     # Set this to on to use timestamping by default:
     #timestamping = off
     
     # It is a good idea to make Wget send your email address in a `From:'
     # header with your request (so that server administrators can contact
     # you in case of errors).  Wget does *not* send `From:' by default.
     #header = From: Your Name <username@site.domain>
     
     # You can set up other headers, like Accept-Language.  Accept-Language
     # is *not* sent by default.
     #header = Accept-Language: en
     
     # You can set the default proxy for Wget to use.  It will override the
     # value in the environment.
     #http_proxy = http://proxy.yoyodyne.com:18023/
     
     # If you do not want to use proxy at all, set this to off.
     #use_proxy = on
     
     # You can customize the retrieval outlook.  Valid options are default,
     # binary, mega and micro.
     #dot_style = default
     
     # Setting this to off makes Wget not download /robots.txt.  Be sure to
     # know *exactly* what /robots.txt is and how it is used before changing
     # the default!
     #robots = on
     
     # It can be useful to make Wget wait between connections.  Set this to
     # the number of seconds you want Wget to wait.
     #wait = 0
     
     # You can force creating directory structure, even if a single is being
     # retrieved, by setting this to on.
     #dirstruct = off
     
     # You can turn on recursive retrieving by default (don't do this if
     # you are not sure you know what it means) by setting this to on.
     #recursive = off
     
     # To always back up file X as X.orig before converting its links (due
     # to -k / --convert-links / convert_links = on having been specified),
     # set this variable to on:
     #backup_converted = off
     
     # To have Wget follow FTP links from HTML files by default, set this
     # to on:
     #follow_ftp = off


File: wget.info,  Node: Examples,  Next: Various,  Prev: Startup File,  Up: Top

Examples
********

   The examples are classified into three sections, because of clarity.
The first section is a tutorial for beginners.  The second section
explains some of the more complex program features.  The third section
contains advice for mirror administrators, as well as even more complex
features (that some would call perverted).

* Menu:

* Simple Usage::        Simple, basic usage of the program.
* Advanced Usage::      Advanced techniques of usage.
* Guru Usage::          Mirroring and the hairy stuff.


File: wget.info,  Node: Simple Usage,  Next: Advanced Usage,  Prev: Examples,  Up: Examples

Simple Usage
============

   * Say you want to download a URL.  Just type:

          wget http://fly.srk.fer.hr/

     The response will be something like:

          --13:30:45--  http://fly.srk.fer.hr:80/en/
                     => `index.html'
          Connecting to fly.srk.fer.hr:80... connected!
          HTTP request sent, awaiting response... 200 OK
          Length: 4,694 [text/html]
          
              0K -> ....                                                   [100%]
          
          13:30:46 (23.75 KB/s) - `index.html' saved [4694/4694]

   * But what will happen if the connection is slow, and the file is
     lengthy?  The connection will probably fail before the whole file
     is retrieved, more than once.  In this case, Wget will try getting
     the file until it either gets the whole of it, or exceeds the
     default number of retries (this being 20).  It is easy to change
     the number of tries to 45, to insure that the whole file will
     arrive safely:

          wget --tries=45 http://fly.srk.fer.hr/jpg/flyweb.jpg

   * Now let's leave Wget to work in the background, and write its
     progress to log file `log'.  It is tiring to type `--tries', so we
     shall use `-t'.

          wget -t 45 -o log http://fly.srk.fer.hr/jpg/flyweb.jpg &

     The ampersand at the end of the line makes sure that Wget works in
     the background.  To unlimit the number of retries, use `-t inf'.

   * The usage of FTP is as simple.  Wget will take care of login and
     password.

          $ wget ftp://gnjilux.srk.fer.hr/welcome.msg
          --10:08:47--  ftp://gnjilux.srk.fer.hr:21/welcome.msg
                     => `welcome.msg'
          Connecting to gnjilux.srk.fer.hr:21... connected!
          Logging in as anonymous ... Logged in!
          ==> TYPE I ... done.  ==> CWD not needed.
          ==> PORT ... done.    ==> RETR welcome.msg ... done.
          Length: 1,340 (unauthoritative)
          
              0K -> .                                                      [100%]
          
          10:08:48 (1.28 MB/s) - `welcome.msg' saved [1340]

   * If you specify a directory, Wget will retrieve the directory
     listing, parse it and convert it to HTML.  Try:

          wget ftp://prep.ai.mit.edu/pub/gnu/
          lynx index.html


File: wget.info,  Node: Advanced Usage,  Next: Guru Usage,  Prev: Simple Usage,  Up: Examples

Advanced Usage
==============

   * You would like to read the list of URLs from a file?  Not a problem
     with that:

          wget -i file

     If you specify `-' as file name, the URLs will be read from
     standard input.

   * Create a mirror image of GNU WWW site (with the same directory
     structure the original has) with only one try per document, saving
     the log of the activities to `gnulog':

          wget -r -t1 http://www.gnu.ai.mit.edu/ -o gnulog

   * Retrieve the first layer of yahoo links:

          wget -r -l1 http://www.yahoo.com/

   * Retrieve the index.html of `www.lycos.com', showing the original
     server headers:

          wget -S http://www.lycos.com/

   * Save the server headers with the file:
          wget -s http://www.lycos.com/
          more index.html

   * Retrieve the first two levels of `wuarchive.wustl.edu', saving them
     to /tmp.

          wget -P/tmp -l2 ftp://wuarchive.wustl.edu/

   * You want to download all the GIFs from an HTTP directory.  `wget
     http://host/dir/*.gif' doesn't work, since HTTP retrieval does not
     support globbing.  In that case, use:

          wget -r -l1 --no-parent -A.gif http://host/dir/

     It is a bit of a kludge, but it works.  `-r -l1' means to retrieve
     recursively (*note Recursive Retrieval::), with maximum depth of 1.
     `--no-parent' means that references to the parent directory are
     ignored (*note Directory-Based Limits::), and `-A.gif' means to
     download only the GIF files.  `-A "*.gif"' would have worked too.

   * Suppose you were in the middle of downloading, when Wget was
     interrupted.  Now you do not want to clobber the files already
     present.  It would be:

          wget -nc -r http://www.gnu.ai.mit.edu/

   * If you want to encode your own username and password to HTTP or
     FTP, use the appropriate URL syntax (*note URL Format::).

          wget ftp://hniksic:mypassword@jagor.srce.hr/.emacs

   * If you do not like the default retrieval visualization (1K dots
     with 10 dots per cluster and 50 dots per line), you can customize
     it through dot settings (*note Wgetrc Commands::).  For example,
     many people like the "binary" style of retrieval, with 8K dots and
     512K lines:

          wget --dot-style=binary ftp://prep.ai.mit.edu/pub/gnu/README

     You can experiment with other styles, like:

          wget --dot-style=mega ftp://ftp.xemacs.org/pub/xemacs/xemacs-20.4/xemacs-20.4.tar.gz
          wget --dot-style=micro http://fly.srk.fer.hr/

     To make these settings permanent, put them in your `.wgetrc', as
     described before (*note Sample Wgetrc::).


File: wget.info,  Node: Guru Usage,  Prev: Advanced Usage,  Up: Examples

Guru Usage
==========

   * If you wish Wget to keep a mirror of a page (or FTP
     subdirectories), use `--mirror' (`-m'), which is the shorthand for
     `-r -N'.  You can put Wget in the crontab file asking it to
     recheck a site each Sunday:

          crontab
          0 0 * * 0 wget --mirror ftp://ftp.xemacs.org/pub/xemacs/ -o /home/me/weeklog

   * You may wish to do the same with someone's home page.  But you do
     not want to download all those images--you're only interested in
     HTML.

          wget --mirror -A.html http://www.w3.org/

   * But what about mirroring the hosts networkologically close to you?
     It seems so awfully slow because of all that DNS resolving.  Just
     use `-D' (*note Domain Acceptance::).

          wget -rN -Dsrce.hr http://www.srce.hr/

     Now Wget will correctly find out that `regoc.srce.hr' is the same
     as `www.srce.hr', but will not even take into consideration the
     link to `www.mit.edu'.

   * You have a presentation and would like the dumb absolute links to
     be converted to relative?  Use `-k':

          wget -k -r URL

   * You would like the output documents to go to standard output
     instead of to files?  OK, but Wget will automatically shut up
     (turn on `--quiet') to prevent mixing of Wget output and the
     retrieved documents.

          wget -O - http://jagor.srce.hr/ http://www.srce.hr/

     You can also combine the two options and make weird pipelines to
     retrieve the documents from remote hotlists:

          wget -O - http://cool.list.com/ | wget --force-html -i -


File: wget.info,  Node: Various,  Next: Appendices,  Prev: Examples,  Up: Top

Various
*******

   This chapter contains all the stuff that could not fit anywhere else.

* Menu:

* Proxies::             Support for proxy servers
* Distribution::        Getting the latest version.
* Mailing List::        Wget mailing list for announcements and discussion.
* Reporting Bugs::      How and where to report bugs.
* Portability::         The systems Wget works on.
* Signals::             Signal-handling performed by Wget.


File: wget.info,  Node: Proxies,  Next: Distribution,  Prev: Various,  Up: Various

Proxies
=======

   "Proxies" are special-purpose HTTP servers designed to transfer data
from remote servers to local clients.  One typical use of proxies is
lightening network load for users behind a slow connection.  This is
achieved by channeling all HTTP and FTP requests through the proxy
which caches the transferred data.  When a cached resource is requested
again, proxy will return the data from cache.  Another use for proxies
is for companies that separate (for security reasons) their internal
networks from the rest of Internet.  In order to obtain information
from the Web, their users connect and retrieve remote data using an
authorized proxy.

   Wget supports proxies for both HTTP and FTP retrievals.  The
standard way to specify proxy location, which Wget recognizes, is using
the following environment variables:

`http_proxy'
     This variable should contain the URL of the proxy for HTTP
     connections.

`ftp_proxy'
     This variable should contain the URL of the proxy for HTTP
     connections.  It is quite common that HTTP_PROXY and FTP_PROXY are
     set to the same URL.

`no_proxy'
     This variable should contain a comma-separated list of domain
     extensions proxy should _not_ be used for.  For instance, if the
     value of `no_proxy' is `.mit.edu', proxy will not be used to
     retrieve documents from MIT.

   In addition to the environment variables, proxy location and settings
may be specified from within Wget itself.

`-Y on/off'
`--proxy=on/off'
`proxy = on/off'
     This option may be used to turn the proxy support on or off.  Proxy
     support is on by default, provided that the appropriate environment
     variables are set.

`http_proxy = URL'
`ftp_proxy = URL'
`no_proxy = STRING'
     These startup file variables allow you to override the proxy
     settings specified by the environment.

   Some proxy servers require authorization to enable you to use them.
The authorization consists of "username" and "password", which must be
sent by Wget.  As with HTTP authorization, several authentication
schemes exist.  For proxy authorization only the `Basic' authentication
scheme is currently implemented.

   You may specify your username and password either through the proxy
URL or through the command-line options.  Assuming that the company's
proxy is located at `proxy.srce.hr' at port 8001, a proxy URL location
containing authorization data might look like this:

     http://hniksic:mypassword@proxy.company.com:8001/

   Alternatively, you may use the `proxy-user' and `proxy-password'
options, and the equivalent `.wgetrc' settings `proxy_user' and
`proxy_passwd' to set the proxy username and password.


File: wget.info,  Node: Distribution,  Next: Mailing List,  Prev: Proxies,  Up: Various

Distribution
============

   Like all GNU utilities, the latest version of Wget can be found at
the master GNU archive site prep.ai.mit.edu, and its mirrors.  For
example, Wget 1.6 can be found at
<ftp://prep.ai.mit.edu/gnu/wget/wget-1.6.tar.gz>


File: wget.info,  Node: Mailing List,  Next: Reporting Bugs,  Prev: Distribution,  Up: Various

Mailing List
============

   Wget has its own mailing list at <wget@sunsite.auc.dk>, thanks to
Karsten Thygesen.  The mailing list is for discussion of Wget features
and web, reporting Wget bugs (those that you think may be of interest
to the public) and mailing announcements.  You are welcome to
subscribe.  The more people on the list, the better!

   To subscribe, send mail to <wget-subscribe@sunsite.auc.dk>.  the
magic word `subscribe' in the subject line.  Unsubscribe by mailing to
<wget-unsubscribe@sunsite.auc.dk>.

   The mailing list is archived at <http://fly.srk.fer.hr/archive/wget>.


File: wget.info,  Node: Reporting Bugs,  Next: Portability,  Prev: Mailing List,  Up: Various

Reporting Bugs
==============

   You are welcome to send bug reports about GNU Wget to
<bug-wget@gnu.org>.  The bugs that you think are of the interest to the
public (i.e. more people should be informed about them) can be Cc-ed to
the mailing list at <wget@sunsite.auc.dk>.

   Before actually submitting a bug report, please try to follow a few
simple guidelines.

  1. Please try to ascertain that the behaviour you see really is a
     bug.  If Wget crashes, it's a bug.  If Wget does not behave as
     documented, it's a bug.  If things work strange, but you are not
     sure about the way they are supposed to work, it might well be a
     bug.

  2. Try to repeat the bug in as simple circumstances as possible.
     E.g. if Wget crashes on `wget -rLl0 -t5 -Y0 http://yoyodyne.com -o
     /tmp/log', you should try to see if it will crash with a simpler
     set of options.

     Also, while I will probably be interested to know the contents of
     your `.wgetrc' file, just dumping it into the debug message is
     probably a bad idea.  Instead, you should first try to see if the
     bug repeats with `.wgetrc' moved out of the way.  Only if it turns
     out that `.wgetrc' settings affect the bug, should you mail me the
     relevant parts of the file.

  3. Please start Wget with `-d' option and send the log (or the
     relevant parts of it).  If Wget was compiled without debug support,
     recompile it.  It is _much_ easier to trace bugs with debug support
     on.

  4. If Wget has crashed, try to run it in a debugger, e.g. `gdb `which
     wget` core' and type `where' to get the backtrace.

  5. Find where the bug is, fix it and send me the patches. :-)


File: wget.info,  Node: Portability,  Next: Signals,  Prev: Reporting Bugs,  Up: Various

Portability
===========

   Since Wget uses GNU Autoconf for building and configuring, and avoids
using "special" ultra-mega-cool features of any particular Unix, it
should compile (and work) on all common Unix flavors.

   Various Wget versions have been compiled and tested under many kinds
of Unix systems, including Solaris, Linux, SunOS, OSF (aka Digital
Unix), Ultrix, *BSD, IRIX, and others; refer to the file `MACHINES' in
the distribution directory for a comprehensive list.  If you compile it
on an architecture not listed there, please let me know so I can update
it.

   Wget should also compile on the other Unix systems, not listed in
`MACHINES'.  If it doesn't, please let me know.

   Thanks to kind contributors, this version of Wget compiles and works
on Microsoft Windows 95 and Windows NT platforms.  It has been compiled
successfully using MS Visual C++ 4.0, Watcom, and Borland C compilers,
with Winsock as networking software.  Naturally, it is crippled of some
features available on Unix, but it should work as a substitute for
people stuck with Windows.  Note that the Windows port is *neither
tested nor maintained* by me--all questions and problems should be
reported to Wget mailing list at <wget@sunsite.auc.dk> where the
maintainers will look at them.


File: wget.info,  Node: Signals,  Prev: Portability,  Up: Various

Signals
=======

   Since the purpose of Wget is background work, it catches the hangup
signal (`SIGHUP') and ignores it.  If the output was on standard
output, it will be redirected to a file named `wget-log'.  Otherwise,
`SIGHUP' is ignored.  This is convenient when you wish to redirect the
output of Wget after having started it.

     $ wget http://www.ifi.uio.no/~larsi/gnus.tar.gz &
     $ kill -HUP %%     # Redirect the output to wget-log

   Other than that, Wget will not try to interfere with signals in any
way.  `C-c', `kill -TERM' and `kill -KILL' should kill it alike.


File: wget.info,  Node: Appendices,  Next: Copying,  Prev: Various,  Up: Top

Appendices
**********

   This chapter contains some references I consider useful.

* Menu:

* Robots::                  Wget as a WWW robot.
* Security Considerations:: Security with Wget.
* Contributors::            People who helped.


File: wget.info,  Node: Robots,  Next: Security Considerations,  Prev: Appendices,  Up: Appendices

Robots
======

   It is extremely easy to make Wget wander aimlessly around a web site,
sucking all the available data in progress.  `wget -r SITE', and you're
set.  Great?  Not for the server admin.

   While Wget is retrieving static pages, there's not much of a problem.
But for Wget, there is no real difference between the smallest static
page and the hardest, most demanding CGI or dynamic page.  For instance,
a site I know has a section handled by an, uh, bitchin' CGI script that
converts all the Info files to HTML.  The script can and does bring the
machine to its knees without providing anything useful to the
downloader.

   For such and similar cases various robot exclusion schemes have been
devised as a means for the server administrators and document authors to
protect chosen portions of their sites from the wandering of robots.

   The more popular mechanism is the "Robots Exclusion Standard"
written by Martijn Koster et al. in 1994.  It is specified by placing a
file named `/robots.txt' in the server root, which the robots are
supposed to download and parse.  Wget supports this specification.

   Norobots support is turned on only when retrieving recursively, and
_never_ for the first page.  Thus, you may issue:

     wget -r http://fly.srk.fer.hr/

   First the index of fly.srk.fer.hr will be downloaded.  If Wget finds
anything worth downloading on the same host, only _then_ will it load
the robots, and decide whether or not to load the links after all.
`/robots.txt' is loaded only once per host.

   Note that the exlusion standard discussed here has undergone some
revisions.  However, but Wget supports only the first version of RES,
the one written by Martijn Koster in 1994, available at
<http://info.webcrawler.com/mak/projects/robots/norobots.html>.  A
later version exists in the form of an internet draft
<draft-koster-robots-00.txt> titled "A Method for Web Robots Control",
which expired on June 4, 1997.  I am not aware if it ever made to an
RFC.  The text of the draft is available at
<http://info.webcrawler.com/mak/projects/robots/norobots-rfc.html>.
Wget does not yet support the new directives specified by this draft,
but we plan to add them.

   This manual no longer includes the text of the old standard.

   The second, less known mechanism, enables the author of an individual
document to specify whether they want the links from the file to be
followed by a robot.  This is achieved using the `META' tag, like this:

     <meta name="robots" content="nofollow">

   This is explained in some detail at
<http://info.webcrawler.com/mak/projects/robots/meta-user.html>.
Unfortunately, Wget does not support this method of robot exclusion yet,
but it will be implemented in the next release.


File: wget.info,  Node: Security Considerations,  Next: Contributors,  Prev: Robots,  Up: Appendices

Security Considerations
=======================

   When using Wget, you must be aware that it sends unencrypted
passwords through the network, which may present a security problem.
Here are the main issues, and some solutions.

  1. The passwords on the command line are visible using `ps'.  If this
     is a problem, avoid putting passwords from the command line--e.g.
     you can use `.netrc' for this.

  2. Using the insecure "basic" authentication scheme, unencrypted
     passwords are transmitted through the network routers and gateways.

  3. The FTP passwords are also in no way encrypted.  There is no good
     solution for this at the moment.

  4. Although the "normal" output of Wget tries to hide the passwords,
     debugging logs show them, in all forms.  This problem is avoided by
     being careful when you send debug logs (yes, even when you send
     them to me).


File: wget.info,  Node: Contributors,  Prev: Security Considerations,  Up: Appendices

Contributors
============

   GNU Wget was written by Hrvoje Niksic <hniksic@arsdigita.com>.
However, its development could never have gone as far as it has, were it
not for the help of many people, either with bug reports, feature
proposals, patches, or letters saying "Thanks!".

   Special thanks goes to the following people (no particular order):

   * Karsten Thygesen--donated system resources such as the mailing
     list, web space, and FTP space, along with a lot of time to make
     these actually work.

   * Shawn McHorse--bug reports and patches.

   * Kaveh R. Ghazi--on-the-fly `ansi2knr'-ization.  Lots of
     portability fixes.

   * Gordon Matzigkeit--`.netrc' support.

   * Zlatko Calusic, Tomislav Vujec and Drazen Kacar--feature
     suggestions and "philosophical" discussions.

   * Darko Budor--initial port to Windows.

   * Antonio Rosella--help and suggestions, plus the Italian
     translation.

   * Tomislav Petrovic, Mario Mikocevic--many bug reports and
     suggestions.

   * Francois Pinard--many thorough bug reports and discussions.

   * Karl Eichwalder--lots of help with internationalization and other
     things.

   * Junio Hamano--donated support for Opie and HTTP `Digest'
     authentication.

   * Brian Gough--a generous donation.

   The following people have provided patches, bug/build reports, useful
suggestions, beta testing services, fan mail and all the other things
that make maintenance so much fun:

   Tim Adam, Adrian Aichner, Martin Baehr, Dieter Baron, Roger Beeman
and the Gurus at Cisco, Dan Berger, Mark Boyns, John Burden, Wanderlei
Cavassin, Gilles Cedoc, Tim Charron, Noel Cragg, Kristijan Conkas, John
Daily, Andrew Davison, Andrew Deryabin, Ulrich Drepper, Marc Duponcheel,
Damir Dzeko, Aleksandar Erkalovic, Andy Eskilsson, Masashi Fujita,
Howard Gayle, Marcel Gerrits, Hans Grobler, Mathieu Guillaume, Dan
Harkless, Heiko Herold, Karl Heuer, HIROSE Masaaki, Gregor Hoffleit,
Erik Magnus Hulthen, Richard Huveneers, Simon Josefsson, Mario Juric,
Const Kaplinsky, Goran Kezunovic, Robert Kleine, Fila Kolodny,
Alexander Kourakos, Martin Kraemer, Simos KSenitellis, Hrvoje Lacko,
Daniel S. Lewart, Dave Love, Alexander V. Lukyanov, Jordan Mendelson,
Lin Zhe Min, Simon Munton, Charlie Negyesi, R. K. Owen, Andrew Pollock,
Steve Pothier, Jan Prikryl, Marin Purgar, Keith Refson, Tyler Riddle,
Tobias Ringstrom, Juan Jose Rodrigues, Edward J. Sabol, Heinz Salzmann,
Robert Schmidt, Andreas Schwab, Toomas Soome, Tage Stabell-Kulo, Sven
Sternberger, Markus Strasser, Szakacsits Szabolcs, Mike Thomas, Russell
Vincent, Charles G Waldman, Douglas E. Wegscheid, Jasmin Zainul, Bojan
Zdrnja, Kristijan Zimmer.

   Apologies to all who I accidentally left out, and many thanks to all
the subscribers of the Wget mailing list.


File: wget.info,  Node: Copying,  Next: Concept Index,  Prev: Appendices,  Up: Top

Copying
*******

   Wget is "free software", where "free" refers to liberty, not price.
As the GNU people like to say, think of "free speech" rather than "free
beer".  The exact legal distribution terms follow below, but in short,
you have the right (freedom) to run and change Wget and distribute it
to other people, and even--if you want--charge money for any of these
things.  The sole restriction is that you have to grant your recipients
the same rights.

   This method of licensing software is also known as "open-source",
because it requires that the recipients always receive a program's
source code along with the program.

   More specifically:

     This program is free software; you can redistribute it and/or
     modify it under the terms of the GNU General Public License as
     published by the Free Software Foundation; either version 2 of the
     License, or (at your option) any later version.

     This program is distributed in the hope that it will be useful, but
     WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     General Public License for more details.

     You should have received a copy of the GNU General Public License
     along with this program; if not, write to the Free Software
     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

   In addition to this, this manual is free in the same sense:

     Permission is granted to copy, distribute and/or modify this
     document under the terms of the GNU Free Documentation License,
     Version 1.1 or any later version published by the Free Software
     Foundation; with the Invariant Sections being "GNU General Public
     License" and "GNU Free Documentation License", with no Front-Cover
     Texts, and with no Back-Cover Texts.  A copy of the license is
     included in the section entitled "GNU Free Documentation License".

   The full texts of the GNU General Public License and of the GNU Free
Documentation License are available below.

* Menu:

* GNU General Public License::
* GNU Free Documentation License::


File: wget.info,  Node: GNU General Public License,  Next: GNU Free Documentation License,  Prev: Copying,  Up: Copying

GNU General Public License
==========================

                         Version 2, June 1991

     Copyright (C) 1989, 1991 Free Software Foundation, Inc.
     675 Mass Ave, Cambridge, MA 02139, USA
     
     Everyone is permitted to copy and distribute verbatim copies
     of this license document, but changing it is not allowed.

Preamble
========

   The licenses for most software are designed to take away your
freedom to share and change it.  By contrast, the GNU General Public
License is intended to guarantee your freedom to share and change free
software--to make sure the software is free for all its users.  This
General Public License applies to most of the Free Software
Foundation's software and to any other program whose authors commit to
using it.  (Some other Free Software Foundation software is covered by
the GNU Library General Public License instead.)  You can apply it to
your programs, too.

   When we speak of free software, we are referring to freedom, not
price.  Our General Public Licenses are designed to make sure that you
have the freedom to distribute copies of free software (and charge for
this service if you wish), that you receive source code or can get it
if you want it, that you can change the software or use pieces of it in
new free programs; and that you know you can do these things.

   To protect your rights, we need to make restrictions that forbid
anyone to deny you these rights or to ask you to surrender the rights.
These restrictions translate to certain responsibilities for you if you
distribute copies of the software, or if you modify it.

   For example, if you distribute copies of such a program, whether
gratis or for a fee, you must give the recipients all the rights that
you have.  You must make sure that they, too, receive or can get the
source code.  And you must show them these terms so they know their
rights.

   We protect your rights with two steps: (1) copyright the software,
and (2) offer you this license which gives you legal permission to copy,
distribute and/or modify the software.

   Also, for each author's protection and ours, we want to make certain
that everyone understands that there is no warranty for this free
software.  If the software is modified by someone else and passed on, we
want its recipients to know that what they have is not the original, so
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   Finally, any free program is threatened constantly by software
patents.  We wish to avoid the danger that redistributors of a free
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patent must be licensed for everyone's free use or not licensed at all.

   The precise terms and conditions for copying, distribution and
modification follow.

    TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION

  1. This License applies to any program or other work which contains a
     notice placed by the copyright holder saying it may be distributed
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     licensee is addressed as "you".

     Activities other than copying, distribution and modification are
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  2. You may copy and distribute verbatim copies of the Program's
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     this License along with the Program.

     You may charge a fee for the physical act of transferring a copy,
     and you may at your option offer warranty protection in exchange
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       a. You must cause the modified files to carry prominent notices
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     These requirements apply to the modified work as a whole.  If
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                                NO WARRANTY

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     MODIFY AND/OR REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE
     LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL,
     INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR
     INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
     DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU
     OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY
     OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN
     ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.

                      END OF TERMS AND CONDITIONS

How to Apply These Terms to Your New Programs
=============================================

   If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these
terms.

   To do so, attach the following notices to the program.  It is safest
to attach them to the start of each source file to most effectively
convey the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.

     ONE LINE TO GIVE THE PROGRAM'S NAME AND AN IDEA OF WHAT IT DOES.
     Copyright (C) 19YY  NAME OF AUTHOR
     
     This program is free software; you can redistribute it and/or
     modify it under the terms of the GNU General Public License
     as published by the Free Software Foundation; either version 2
     of the License, or (at your option) any later version.
     
     This program is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     GNU General Public License for more details.
     
     You should have received a copy of the GNU General Public License
     along with this program; if not, write to the Free Software
     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

   Also add information on how to contact you by electronic and paper
mail.

   If the program is interactive, make it output a short notice like
this when it starts in an interactive mode:

     Gnomovision version 69, Copyright (C) 19YY NAME OF AUTHOR
     Gnomovision comes with ABSOLUTELY NO WARRANTY; for details
     type `show w'.  This is free software, and you are welcome
     to redistribute it under certain conditions; type `show c'
     for details.

   The hypothetical commands `show w' and `show c' should show the
appropriate parts of the General Public License.  Of course, the
commands you use may be called something other than `show w' and `show
c'; they could even be mouse-clicks or menu items--whatever suits your
program.

   You should also get your employer (if you work as a programmer) or
your school, if any, to sign a "copyright disclaimer" for the program,
if necessary.  Here is a sample; alter the names:

     Yoyodyne, Inc., hereby disclaims all copyright
     interest in the program `Gnomovision'
     (which makes passes at compilers) written
     by James Hacker.
     
     SIGNATURE OF TY COON, 1 April 1989
     Ty Coon, President of Vice

   This General Public License does not permit incorporating your
program into proprietary programs.  If your program is a subroutine
library, you may consider it more useful to permit linking proprietary
applications with the library.  If this is what you want to do, use the
GNU Library General Public License instead of this License.


File: wget.info,  Node: GNU Free Documentation License,  Prev: GNU General Public License,  Up: Copying

GNU Free Documentation License
==============================

                        Version 1.1, March 2000

     Copyright (C) 2000  Free Software Foundation, Inc.
     59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
     
     Everyone is permitted to copy and distribute verbatim copies
     of this license document, but changing it is not allowed.



  0. PREAMBLE

     The purpose of this License is to make a manual, textbook, or other
     written document "free" in the sense of freedom: to assure everyone
     the effective freedom to copy and redistribute it, with or without
     modifying it, either commercially or noncommercially.  Secondarily,
     this License preserves for the author and publisher a way to get
     credit for their work, while not being considered responsible for
     modifications made by others.

     This License is a kind of "copyleft", which means that derivative
     works of the document must themselves be free in the same sense.
     It complements the GNU General Public License, which is a copyleft
     license designed for free software.

     We have designed this License in order to use it for manuals for
     free software, because free software needs free documentation: a
     free program should come with manuals providing the same freedoms
     that the software does.  But this License is not limited to
     software manuals; it can be used for any textual work, regardless
     of subject matter or whether it is published as a printed book.
     We recommend this License principally for works whose purpose is
     instruction or reference.


  1. APPLICABILITY AND DEFINITIONS

     This License applies to any manual or other work that contains a
     notice placed by the copyright holder saying it can be distributed
     under the terms of this License.  The "Document", below, refers to
     any such manual or work.  Any member of the public is a licensee,
     and is addressed as "you".

     A "Modified Version" of the Document means any work containing the
     Document or a portion of it, either copied verbatim, or with
     modifications and/or translated into another language.

     A "Secondary Section" is a named appendix or a front-matter
     section of the Document that deals exclusively with the
     relationship of the publishers or authors of the Document to the
     Document's overall subject (or to related matters) and contains
     nothing that could fall directly within that overall subject.
     (For example, if the Document is in part a textbook of
     mathematics, a Secondary Section may not explain any mathematics.)
     The relationship could be a matter of historical connection with
     the subject or with related matters, or of legal, commercial,
     philosophical, ethical or political position regarding them.

     The "Invariant Sections" are certain Secondary Sections whose
     titles are designated, as being those of Invariant Sections, in
     the notice that says that the Document is released under this
     License.

     The "Cover Texts" are certain short passages of text that are
     listed, as Front-Cover Texts or Back-Cover Texts, in the notice
     that says that the Document is released under this License.

     A "Transparent" copy of the Document means a machine-readable copy,
     represented in a format whose specification is available to the
     general public, whose contents can be viewed and edited directly
     and straightforwardly with generic text editors or (for images
     composed of pixels) generic paint programs or (for drawings) some
     widely available drawing editor, and that is suitable for input to
     text formatters or for automatic translation to a variety of
     formats suitable for input to text formatters.  A copy made in an
     otherwise Transparent file format whose markup has been designed
     to thwart or discourage subsequent modification by readers is not
     Transparent.  A copy that is not "Transparent" is called "Opaque".

     Examples of suitable formats for Transparent copies include plain
     ASCII without markup, Texinfo input format, LaTeX input format,
     SGML or XML using a publicly available DTD, and
     standard-conforming simple HTML designed for human modification.
     Opaque formats include PostScript, PDF, proprietary formats that
     can be read and edited only by proprietary word processors, SGML
     or XML for which the DTD and/or processing tools are not generally
     available, and the machine-generated HTML produced by some word
     processors for output purposes only.

     The "Title Page" means, for a printed book, the title page itself,
     plus such following pages as are needed to hold, legibly, the
     material this License requires to appear in the title page.  For
     works in formats which do not have any title page as such, "Title
     Page" means the text near the most prominent appearance of the
     work's title, preceding the beginning of the body of the text.


  2. VERBATIM COPYING

     You may copy and distribute the Document in any medium, either
     commercially or noncommercially, provided that this License, the
     copyright notices, and the license notice saying this License
     applies to the Document are reproduced in all copies, and that you
     add no other conditions whatsoever to those of this License.  You
     may not use technical measures to obstruct or control the reading
     or further copying of the copies you make or distribute.  However,
     you may accept compensation in exchange for copies.  If you
     distribute a large enough number of copies you must also follow
     the conditions in section 3.

     You may also lend copies, under the same conditions stated above,
     and you may publicly display copies.


  3. COPYING IN QUANTITY

     If you publish printed copies of the Document numbering more than
     100, and the Document's license notice requires Cover Texts, you
     must enclose the copies in covers that carry, clearly and legibly,
     all these Cover Texts: Front-Cover Texts on the front cover, and
     Back-Cover Texts on the back cover.  Both covers must also clearly
     and legibly identify you as the publisher of these copies.  The
     front cover must present the full title with all words of the
     title equally prominent and visible.  You may add other material
     on the covers in addition.  Copying with changes limited to the
     covers, as long as they preserve the title of the Document and
     satisfy these conditions, can be treated as verbatim copying in
     other respects.

     If the required texts for either cover are too voluminous to fit
     legibly, you should put the first ones listed (as many as fit
     reasonably) on the actual cover, and continue the rest onto
     adjacent pages.

     If you publish or distribute Opaque copies of the Document
     numbering more than 100, you must either include a
     machine-readable Transparent copy along with each Opaque copy, or
     state in or with each Opaque copy a publicly-accessible
     computer-network location containing a complete Transparent copy
     of the Document, free of added material, which the general
     network-using public has access to download anonymously at no
     charge using public-standard network protocols.  If you use the
     latter option, you must take reasonably prudent steps, when you
     begin distribution of Opaque copies in quantity, to ensure that
     this Transparent copy will remain thus accessible at the stated
     location until at least one year after the last time you
     distribute an Opaque copy (directly or through your agents or
     retailers) of that edition to the public.

     It is requested, but not required, that you contact the authors of
     the Document well before redistributing any large number of
     copies, to give them a chance to provide you with an updated
     version of the Document.


  4. MODIFICATIONS

     You may copy and distribute a Modified Version of the Document
     under the conditions of sections 2 and 3 above, provided that you
     release the Modified Version under precisely this License, with
     the Modified Version filling the role of the Document, thus
     licensing distribution and modification of the Modified Version to
     whoever possesses a copy of it.  In addition, you must do these
     things in the Modified Version:

     A. Use in the Title Page (and on the covers, if any) a title
     distinct    from that of the Document, and from those of previous
     versions    (which should, if there were any, be listed in the
     History section    of the Document).  You may use the same title
     as a previous version    if the original publisher of that version
     gives permission.
     B. List on the Title Page, as authors, one or more persons or
     entities    responsible for authorship of the modifications in the
     Modified    Version, together with at least five of the principal
     authors of the    Document (all of its principal authors, if it
     has less than five).
     C. State on the Title page the name of the publisher of the
     Modified Version, as the publisher.
     D. Preserve all the copyright notices of the Document.
     E. Add an appropriate copyright notice for your modifications
     adjacent to the other copyright notices.
     F. Include, immediately after the copyright notices, a license
     notice    giving the public permission to use the Modified Version
     under the    terms of this License, in the form shown in the
     Addendum below.
     G. Preserve in that license notice the full lists of Invariant
     Sections    and required Cover Texts given in the Document's
     license notice.
     H. Include an unaltered copy of this License.
     I. Preserve the section entitled "History", and its title, and add
     to    it an item stating at least the title, year, new authors, and
       publisher of the Modified Version as given on the Title Page.
     If    there is no section entitled "History" in the Document,
     create one    stating the title, year, authors, and publisher of
     the Document as    given on its Title Page, then add an item
     describing the Modified    Version as stated in the previous
     sentence.
     J. Preserve the network location, if any, given in the Document for
       public access to a Transparent copy of the Document, and
     likewise    the network locations given in the Document for
     previous versions    it was based on.  These may be placed in the
     "History" section.     You may omit a network location for a work
     that was published at    least four years before the Document
     itself, or if the original    publisher of the version it refers
     to gives permission.
     K. In any section entitled "Acknowledgements" or "Dedications",
     preserve the section's title, and preserve in the section all the
      substance and tone of each of the contributor acknowledgements
     and/or dedications given therein.
     L. Preserve all the Invariant Sections of the Document,
     unaltered in their text and in their titles.  Section numbers
     or the equivalent are not considered part of the section titles.
     M. Delete any section entitled "Endorsements".  Such a section
     may not be included in the Modified Version.
     N. Do not retitle any existing section as "Endorsements"    or to
     conflict in title with any Invariant Section.

     If the Modified Version includes new front-matter sections or
     appendices that qualify as Secondary Sections and contain no
     material copied from the Document, you may at your option
     designate some or all of these sections as invariant.  To do this,
     add their titles to the list of Invariant Sections in the Modified
     Version's license notice.  These titles must be distinct from any
     other section titles.

     You may add a section entitled "Endorsements", provided it contains
     nothing but endorsements of your Modified Version by various
     parties-for example, statements of peer review or that the text has
     been approved by an organization as the authoritative definition
     of a standard.

     You may add a passage of up to five words as a Front-Cover Text,
     and a passage of up to 25 words as a Back-Cover Text, to the end
     of the list of Cover Texts in the Modified Version.  Only one
     passage of Front-Cover Text and one of Back-Cover Text may be
     added by (or through arrangements made by) any one entity.  If the
     Document already includes a cover text for the same cover,
     previously added by you or by arrangement made by the same entity
     you are acting on behalf of, you may not add another; but you may
     replace the old one, on explicit permission from the previous
     publisher that added the old one.

     The author(s) and publisher(s) of the Document do not by this
     License give permission to use their names for publicity for or to
     assert or imply endorsement of any Modified Version.


  5. COMBINING DOCUMENTS

     You may combine the Document with other documents released under
     this License, under the terms defined in section 4 above for
     modified versions, provided that you include in the combination
     all of the Invariant Sections of all of the original documents,
     unmodified, and list them all as Invariant Sections of your
     combined work in its license notice.

     The combined work need only contain one copy of this License, and
     multiple identical Invariant Sections may be replaced with a single
     copy.  If there are multiple Invariant Sections with the same name
     but different contents, make the title of each such section unique
     by adding at the end of it, in parentheses, the name of the
     original author or publisher of that section if known, or else a
     unique number.  Make the same adjustment to the section titles in
     the list of Invariant Sections in the license notice of the
     combined work.

     In the combination, you must combine any sections entitled
     "History" in the various original documents, forming one section
     entitled "History"; likewise combine any sections entitled
     "Acknowledgements", and any sections entitled "Dedications".  You
     must delete all sections entitled "Endorsements."


  6. COLLECTIONS OF DOCUMENTS

     You may make a collection consisting of the Document and other
     documents released under this License, and replace the individual
     copies of this License in the various documents with a single copy
     that is included in the collection, provided that you follow the
     rules of this License for verbatim copying of each of the
     documents in all other respects.

     You may extract a single document from such a collection, and
     distribute it individually under this License, provided you insert
     a copy of this License into the extracted document, and follow
     this License in all other respects regarding verbatim copying of
     that document.


  7. AGGREGATION WITH INDEPENDENT WORKS

     A compilation of the Document or its derivatives with other
     separate and independent documents or works, in or on a volume of
     a storage or distribution medium, does not as a whole count as a
     Modified Version of the Document, provided no compilation
     copyright is claimed for the compilation.  Such a compilation is
     called an "aggregate", and this License does not apply to the
     other self-contained works thus compiled with the Document, on
     account of their being thus compiled, if they are not themselves
     derivative works of the Document.

     If the Cover Text requirement of section 3 is applicable to these
     copies of the Document, then if the Document is less than one
     quarter of the entire aggregate, the Document's Cover Texts may be
     placed on covers that surround only the Document within the
     aggregate.  Otherwise they must appear on covers around the whole
     aggregate.


  8. TRANSLATION

     Translation is considered a kind of modification, so you may
     distribute translations of the Document under the terms of section
     4.  Replacing Invariant Sections with translations requires special
     permission from their copyright holders, but you may include
     translations of some or all Invariant Sections in addition to the
     original versions of these Invariant Sections.  You may include a
     translation of this License provided that you also include the
     original English version of this License.  In case of a
     disagreement between the translation and the original English
     version of this License, the original English version will prevail.


  9. TERMINATION

     You may not copy, modify, sublicense, or distribute the Document
     except as expressly provided for under this License.  Any other
     attempt to copy, modify, sublicense or distribute the Document is
     void, and will automatically terminate your rights under this
     License.  However, parties who have received copies, or rights,
     from you under this License will not have their licenses
     terminated so long as such parties remain in full compliance.


 10. FUTURE REVISIONS OF THIS LICENSE

     The Free Software Foundation may publish new, revised versions of
     the GNU Free Documentation License from time to time.  Such new
     versions will be similar in spirit to the present version, but may
     differ in detail to address new problems or concerns.  See
     http://www.gnu.org/copyleft/.

     Each version of the License is given a distinguishing version
     number.  If the Document specifies that a particular numbered
     version of this License "or any later version" applies to it, you
     have the option of following the terms and conditions either of
     that specified version or of any later version that has been
     published (not as a draft) by the Free Software Foundation.  If
     the Document does not specify a version number of this License,
     you may choose any version ever published (not as a draft) by the
     Free Software Foundation.


ADDENDUM: How to use this License for your documents
====================================================

   To use this License in a document you have written, include a copy of
the License in the document and put the following copyright and license
notices just after the title page:


       Copyright (C)  YEAR  YOUR NAME.
       Permission is granted to copy, distribute and/or modify this document
       under the terms of the GNU Free Documentation License, Version 1.1
       or any later version published by the Free Software Foundation;
       with the Invariant Sections being LIST THEIR TITLES, with the
       Front-Cover Texts being LIST, and with the Back-Cover Texts being LIST.
       A copy of the license is included in the section entitled ``GNU
       Free Documentation License''.
If you have no Invariant Sections, write "with no Invariant
Sections" instead of saying which ones are invariant.  If you have no
Front-Cover Texts, write "no Front-Cover Texts" instead of "Front-Cover
Texts being LIST"; likewise for Back-Cover Texts.

   If your document contains nontrivial examples of program code, we
recommend releasing these examples in parallel under your choice of
free software license, such as the GNU General Public License, to
permit their use in free software.


File: wget.info,  Node: Concept Index,  Prev: Copying,  Up: Top

Concept Index
*************

* Menu:

* .html extension:                       HTTP Options.
* .netrc:                                Startup File.
* .wgetrc:                               Startup File.
* accept directories:                    Directory-Based Limits.
* accept suffixes:                       Types of Files.
* accept wildcards:                      Types of Files.
* all hosts:                             All Hosts.
* append to log:                         Logging and Input File Options.
* arguments:                             Invoking.
* authentication:                        HTTP Options.
* backing up converted files:            Recursive Retrieval Options.
* base for relative links in input file: Logging and Input File Options.
* bind() address:                        Download Options.
* bug reports:                           Reporting Bugs.
* bugs:                                  Reporting Bugs.
* cache:                                 HTTP Options.
* client IP address:                     Download Options.
* clobbering, file:                      Download Options.
* command line:                          Invoking.
* Content-Length, ignore:                HTTP Options.
* continue retrieval:                    Download Options.
* contributors:                          Contributors.
* conversion of links:                   Recursive Retrieval Options.
* copying:                               Copying.
* cut directories:                       Directory Options.
* debug:                                 Logging and Input File Options.
* delete after retrieval:                Recursive Retrieval Options.
* directories:                           Directory-Based Limits.
* directories, exclude:                  Directory-Based Limits.
* directories, include:                  Directory-Based Limits.
* directory limits:                      Directory-Based Limits.
* directory prefix:                      Directory Options.
* DNS lookup:                            Host Checking.
* dot style:                             Download Options.
* downloading multiple times:            Download Options.
* examples:                              Examples.
* exclude directories:                   Directory-Based Limits.
* execute wgetrc command:                Basic Startup Options.
* features:                              Overview.
* filling proxy cache:                   Recursive Retrieval Options.
* follow FTP links:                      Recursive Accept/Reject Options.
* following ftp links:                   FTP Links.
* following links:                       Following Links.
* force html:                            Logging and Input File Options.
* ftp time-stamping:                     FTP Time-Stamping Internals.
* GFDL:                                  Copying.
* globbing, toggle:                      FTP Options.
* GPL:                                   Copying.
* hangup:                                Signals.
* header, add:                           HTTP Options.
* host checking:                         Host Checking.
* host lookup:                           Host Checking.
* http password:                         HTTP Options.
* http referer:                          HTTP Options.
* http time-stamping:                    HTTP Time-Stamping Internals.
* http user:                             HTTP Options.
* ignore length:                         HTTP Options.
* include directories:                   Directory-Based Limits.
* incremental updating:                  Time-Stamping.
* input-file:                            Logging and Input File Options.
* invoking:                              Invoking.
* IP address, client:                    Download Options.
* latest version:                        Distribution.
* link conversion:                       Recursive Retrieval Options.
* links:                                 Following Links.
* list:                                  Mailing List.
* location of wgetrc:                    Wgetrc Location.
* log file:                              Logging and Input File Options.
* mailing list:                          Mailing List.
* mirroring:                             Guru Usage.
* no parent:                             Directory-Based Limits.
* no warranty:                           GNU General Public License.
* no-clobber:                            Download Options.
* nohup:                                 Invoking.
* number of retries:                     Download Options.
* operating systems:                     Portability.
* option syntax:                         Option Syntax.
* output file:                           Logging and Input File Options.
* overview:                              Overview.
* page requisites:                       Recursive Retrieval Options.
* passive ftp:                           FTP Options.
* pause:                                 Download Options.
* portability:                           Portability.
* proxies:                               Proxies.
* proxy <1>:                             Download Options.
* proxy:                                 HTTP Options.
* proxy authentication:                  HTTP Options.
* proxy filling:                         Recursive Retrieval Options.
* proxy password:                        HTTP Options.
* proxy user:                            HTTP Options.
* quiet:                                 Logging and Input File Options.
* quota:                                 Download Options.
* recursion:                             Recursive Retrieval.
* recursive retrieval:                   Recursive Retrieval.
* redirecting output:                    Guru Usage.
* referer, http:                         HTTP Options.
* reject directories:                    Directory-Based Limits.
* reject suffixes:                       Types of Files.
* reject wildcards:                      Types of Files.
* relative links:                        Relative Links.
* reporting bugs:                        Reporting Bugs.
* required images, downloading:          Recursive Retrieval Options.
* retries:                               Download Options.
* retries, waiting between:              Download Options.
* retrieval tracing style:               Download Options.
* retrieving:                            Recursive Retrieval.
* robots:                                Robots.
* robots.txt:                            Robots.
* sample wgetrc:                         Sample Wgetrc.
* security:                              Security Considerations.
* server maintenance:                    Robots.
* server response, print:                Download Options.
* server response, save:                 HTTP Options.
* signal handling:                       Signals.
* span hosts:                            All Hosts.
* spider:                                Download Options.
* startup:                               Startup File.
* startup file:                          Startup File.
* suffixes, accept:                      Types of Files.
* suffixes, reject:                      Types of Files.
* symbolic links, retrieving:            FTP Options.
* syntax of options:                     Option Syntax.
* syntax of wgetrc:                      Wgetrc Syntax.
* tag-based recursive pruning:           Recursive Accept/Reject Options.
* time-stamping:                         Time-Stamping.
* time-stamping usage:                   Time-Stamping Usage.
* timeout:                               Download Options.
* timestamping:                          Time-Stamping.
* tries:                                 Download Options.
* types of files:                        Types of Files.
* updating the archives:                 Time-Stamping.
* URL:                                   URL Format.
* URL syntax:                            URL Format.
* usage, time-stamping:                  Time-Stamping Usage.
* user-agent:                            HTTP Options.
* various:                               Various.
* verbose:                               Logging and Input File Options.
* wait:                                  Download Options.
* waiting between retries:               Download Options.
* Wget as spider:                        Download Options.
* wgetrc:                                Startup File.
* wgetrc commands:                       Wgetrc Commands.
* wgetrc location:                       Wgetrc Location.
* wgetrc syntax:                         Wgetrc Syntax.
* wildcards, accept:                     Types of Files.
* wildcards, reject:                     Types of Files.



Tag Table:
Node: Top1151
Node: Overview2047
Node: Invoking5214
Node: URL Format6023
Ref: URL Format-Footnote-18251
Node: Option Syntax8353
Node: Basic Startup Options9779
Node: Logging and Input File Options10479
Node: Download Options13005
Node: Directory Options21103
Node: HTTP Options23586
Node: FTP Options28303
Node: Recursive Retrieval Options30286
Node: Recursive Accept/Reject Options35307
Node: Recursive Retrieval38534
Node: Following Links40832
Node: Relative Links41861
Node: Host Checking42375
Node: Domain Acceptance44401
Node: All Hosts46073
Node: Types of Files46500
Node: Directory-Based Limits48950
Node: FTP Links51590
Node: Time-Stamping52460
Node: Time-Stamping Usage54097
Node: HTTP Time-Stamping Internals55666
Ref: HTTP Time-Stamping Internals-Footnote-156937
Node: FTP Time-Stamping Internals57136
Node: Startup File58344
Node: Wgetrc Location59217
Node: Wgetrc Syntax60012
Node: Wgetrc Commands60727
Node: Sample Wgetrc69109
Node: Examples74108
Node: Simple Usage74715
Node: Advanced Usage77117
Node: Guru Usage79869
Node: Various81531
Node: Proxies82055
Node: Distribution84820
Node: Mailing List85159
Node: Reporting Bugs85859
Node: Portability87644
Node: Signals89019
Node: Appendices89674
Node: Robots89992
Node: Security Considerations92844
Node: Contributors93840
Node: Copying96724
Node: GNU General Public License98927
Node: GNU Free Documentation License118127
Node: Concept Index137857

End Tag Table
