Can wget dns request. Wget commands: examples

If you specify — instead of a filename, the URL will be read from stdin. * Create a five-level copy of the GNU site with the original folder structure, with one download attempt, save messages to gnulog:

Wget -r http://www.gnu.org/ -o gnulog * As in the example above, but converting links in HTML files to local ones for later offline viewing: wget ––convert-links -r http: // www.gnu.org/ -o gnulog * Download one HTML page and all the files required to render the latter (eg pictures, cascading style files, etc.). Also convert all links to these files: wget -p ––convert-links http://www.server.com/dir/page.html

The HTML page will be saved in www.server.com/dir/page.html and pictures, cascading styles, etc. will be saved in the folder www.server.com/, except for the case when files will be downloaded from other servers. * As in the example above, but without the folder www.server.com/... Also all files will be saved in subfolders download /.

Wget -p ––convert-links -nH -nd -Pdownload http://www.server.com/dir/page.html * Download index.html from www.lycos.com displaying server headers: wget -S http://www.lycos.com/ * Save headers to a file for later use. wget -s http://www.lycos.com/ more index.html * Download the top two levels wuarchive.wustl.edu v / tmp... wget -r -l2 -P / tmp ftp://wuarchive.wustl.edu/ * Download GIF files folders on the HTTP server. Command wget http://www.server.com/dir/*.gif will not work as wildcards are not supported when downloading over HTTP. Use: wget -r -l1 ––no-parent -A.gif http://www.server.com/dir/

-r -l1 enables recursive loading with a maximum depth of 1. ––No-parent disables following links to the parent folder that has the top level, -A.gif allows uploading only files with the .GIF extension. -A "* .gif" will also work. * Suppose that during a recursive boot, you urgently need to shutdown / restart your computer. To avoid downloading existing files, use:

Wget -nc -r http://www.gnu.org/ * If you want to provide a username and password for an HTTP or FTP server, use the appropriate URL syntax: wget ftp: // hniksic: /.emacs * You want to did the loaded documents go to standard output and not to files? wget -O - http://jagor.srce.hr/ http://www.srce.hr/

If you want to set up a pipeline and load all the sites that are linked on the same page:

Wget -O - ttp: //cool.list.com/ | wget ––force-html -i -

Professional use

With short analogs of the commands:

Wget -m -k -K -E http://www.gnu.org/ -o / home / me / weeklog

Files

FOUND ERRORS

You can submit bug reports to the GNU Wget at< " " >(in English).
Before sending:

1. Make sure that the behavior of the program is really erroneous. If Wget crashes, it is an error. If the behavior of Wget does not match the documentation, then this is a bug. If everything works strangely, but you are not sure how it should actually work, then this may also be a bug. 2. Try to repeat the situation with an error in the minimum number of actions. Do not rush to send .wgetrc, try to do all the actions that led to the error with another settings file (or without it at all). 3. Run Wget with the parameter -d and submit the journal (or parts of it). A lot it is easier to find errors with such logs. 4. If Wget gets an error, try running it in a debugger, for example "gdb` which wget` core "and type" where "to get a backtrace.

CM. ALSO

GNU Info for wget.

AUTHORS

TRANSLATION

COPYRIGHT

Copyright (c) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
2005, 2006, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
This is free software; look for copying conditions in the source texts. There are NO guarantees; the program is NOT intended for SALES.

GNU Wget is a free, non-interactive console program for downloading files over the network. Supports HTTP, FTP and HTTPS protocols, and also supports working through an HTTP proxy server. The program is included in almost all GNU / Linux distributions.

GNU Wget is a non-interactive program. This means that after its launch, the user can influence its operation only with the help of the process control tools of the operating system itself. As a rule, for this, the keyboard shortcuts Ctrl + C are used when it is necessary to interrupt the work of the program and Ctrl + Z to place the current task in the background.

Modern browsers usually have the function of downloading files, however, since the browser is designed for an interactive mode of operation, downloading a large number of files manually can be tedious. Browsers generally do not provide the means to automate these tasks. GNU Wget, for example, supports loading URLs specified in a file. In this way, you can make a list of files, and at any convenient time download them using the GNU Wget.

The command line interface allows you to control GNU Wget from other programs and scripts, which is used to automate file downloads (regular updates, monitoring server availability, etc.).

GNU Wget allows you to download any file on the world wide web (including (X) HTML pages) via HTTP and HTTPS, as well as files and directory lists via FTP.

Files can be downloaded recursively from links in HTML pages, both from one site with a certain depth of following links, or from several. In addition, when uploading via FTP, files can be downloaded “by mask” name (that is, you can specify a group of files with “*”).

GNU Wget also supports resuming a file if the connection is lost.

We all sometimes download files from the Internet. If you use programs with graphical interface, then everything turns out to be extremely simple. However, when working on the Linux command line, things get a little more complicated. Especially for those who are not familiar with the right tools. One such tool is the extremely powerful wget utility, which is suitable for all kinds of downloads. We bring to your attention twelve examples, analyzing which, you can master the basic features of wget.

$ wget https://downloads.sourceforge.net/project/nagios/nagios-4.x/nagios-4.3.1/nagios-4.3.1.tar.gz?r=&ts=1489637334&use_mirror=excellmedia
After entering this command, the download of Nagios Core will begin. During this process, you will be able to see data about the download, for example, information about how much data has already been downloaded, the current speed, and how much time is left until the end of the download.

2. Download the file and save it with a new name

$ wget -O nagios_latest https://downloads.sourceforge.net/project/nagios/nagios-4.x/nagios-4.3.1/nagios-4.3.1.tar.gz?r=&ts=1489637334&use_mirror=excellmedia
With this approach, the uploaded file will be saved under the name nagios_latest.

3. Limiting the speed of downloading files

$ wget ––limit-rate = 500K https://downloads.sourceforge.net/project/nagios/nagios-4.x/nagios-4.3.1/nagios-4.3.1.tar.gz?r=&ts=1489637334&use_mirror = excellmedia
The download speed is set to 500 Kb / s.

4. Completing an interrupted download

$ wget –c https://downloads.sourceforge.net/project/nagios/nagios-4.x/nagios-4.3.1/nagios-4.3.1.tar.gz?r=&ts=1489637334&use_mirror=excellmedia
If this parameter is not used, then the download of the incomplete file will start from the beginning.

$ wget –b https://downloads.sourceforge.net/project/nagios/nagios-4.x/nagios-4.3.1/nagios-4.3.1.tar.gz?r=&ts=1489637334&use_mirror=excellmedia

$ vi url.txt
Add addresses to this file - one on each line. Further, it remains only to start wget, passing the newly created file with the list of downloads to this utility:

$ wget –I url.txt
Execution of this command will result in sequential loading of all files from the list.

7. Increase in the total number of file download attempts

Wget ––tries = 100 https://downloads.sourceforge.net/project/nagios/nagios-4.x/nagios-4.3.1/nagios-4.3.1.tar.gz?r=&ts=1489637334&use_mirror=excellmedia

$ wget FTP url
If a username and password are required to access the file, the command will look like this:

$ wget –-ftp-user = dan ––ftp-password = ********* FTP URL

9. Create a local copy of the website

$ wget --mirror -p --convert-links -P / home / dan xyz.com
Note the additional command line parameters:

• -p: downloads all files required for correct display of HTML pages.
• --convert-links: links in documents will be converted for local site viewing purposes.
• -P / home / dan: Content will be saved to the / home / dan folder.

10. Downloading from the site only files of a certain type

$ wget -r -A.txt Website_url

11. Skipping files of a certain type

$ wget --reject = png Website_url

12. Download using your own .log file

$ wget -o wgetfile.log https://downloads.sourceforge.net/project/nagios/nagios-4.x/nagios-4.3.1/nagios-4.3.1.tar.gz?r=&ts=1489637334&use_mirror=excellmedia

Outcomes

Dear Readers! Are you using Linux command line tools to download files? If yes, please tell us about them.

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.

When creating client TCP / IP connections, bind to ADDRESS on the local computer. ADDRESS can be specified as a hostname or IP address. This option can be useful if your computer is associated with multiple IP addresses.

'—Bind-dns-address = ADDRESS ’

This address overrides the route for DNS requests. If you ever need to circumvent the standard settings from /etc/resolv.conf, this option together with ‘—dns-servers’ is your friend. ADDRESS must be specified either as IPv4 or IPv6 address. Wget needs to be built with libcares for this option to be available.

[libcares only] This address overrides the route for DNS queries. If you ever need to bypass the default settings in /etc/resolv.conf, this parameter, along with ‘—dns-servers’, is your friend. ADDRESS must be specified as either IPv4 or IPv6 address. The wget needs to be built with libcares for this parameter to be available.

‘—Dns-servers = ADDRESSES’

The given address (es) override the standard nameserver addresses, e.g. as configured in /etc/resolv.conf. ADDRESSES may be specified either as IPv4 or IPv6 addresses, comma-separated. Wget needs to be built with libcares for this option to be available.

[libcares only] The addresses provided override the default nameserver addresses, eg. as stated in /etc/resolv.conf. ADDRESSES can be specified as either IPv4 or comma-separated IPv6 addresses. The wget needs to be built with libcares for this parameter to be available.

‘-T number’
'—Tries = number ’

Set number of tries to number. Specify 0 or ‘ inf’For infinite retrying. The default is to retry 20 times, with the exception of fatal errors like “connection refused” or “ not found”(404), which are not retried.

Set the number of attempts for the number. Please indicate 0 (zero) or ‘ inf‘For endless retry. The default is to retry 20 times, except for fatal errors such as "connection refused" or "not found" (404), which are not retry.

‘-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 '-' is used as file, documents will be printed to standard output, disabling link conversion. (Use ‘./-’ to print to a file literally named ‘-’.)

The documents will not be written to the corresponding files, but they will all be merged together and written to the file. If ‘-’ is used as a file, documents will be printed to standard output with link conversion disabled. (Use ‘./-’ to print to a file literally named ‘-’.)

Use of ‘-O’ is not intended to mean simply “use the name file instead of the one in the URL;” rather, it is analogous to shell redirection: ‘ wget -O file http: // foo’Is intended to work like’ wget -O - http: // foo> file'; file will be truncated immediately, and all downloaded content will be written there.

Using "-O" doesn't just mean "use a name file instead of a URL," rather, similar to shell redirection: " wget -O file http: // foo"Is intended to work like‘ wget -O - http: // foo> file‘; the file will be truncated immediately and all uploaded content will be written there.

For this reason, ‘-N’ (for timestamp-checking) is not supported in combination with ‘-O’: since file is always newly created, it will always have a very new timestamp. A warning will be issued if this combination is used.

For this reason, "-N" (for checking the timestamp) is not supported in conjunction with "-O": since the file is always created, it will always have a very new timestamp. A warning will be issued when using this combination.

Similarly, using ‘ -r’Or‘ -p’With‘ -O’May not work as you expect: Wget won’t just download the first file to file and then download the rest to their normal names: all downloaded content will be placed in file. This was disabled in version 1.11, but has been reinstated (with a warning) in 1.11.2, as there are some cases where this behavior can actually have some use.

Likewise, using ‘ -r' or ' -p' with ' -O'May not work as you expect: Wget will not just download the first file to a file and then load the rest in their normal names: all downloaded content will be placed in the file. This was disabled in version 1.11, but has been reinstated (with a warning) in 1.11.2, as there are cases where this behavior could actually be used.

A combination with ' -nc’Is only accepted if the given output file does not exist.

Combination with ' -nc'Is only accepted if the given output file does not exist.

Note that a combination with ' -k’Is only permitted when downloading a single document, as in that case it will just convert all relative URIs to external ones; ‘ -k’Makes no sense for multiple URIs when they’re all being downloaded to a single file; ‘ -k’Can be used only when the output is a regular file.

Note that the combination with " -k»Allowed only when loading one document, since in this case it will simply convert all relative URIs to external ones; " -k»Does not make sense for multiple URIs when they are all loaded into one file; ‘ -k'Can only be used when the output is a regular file.

‘-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.

If a file is downloaded more than once in the same directory, the behavior Wget depends on several parameters including "-Nc"... In some cases, the local file will be dumped or overwritten when reloaded. In other cases, it will be saved.

When running Wget without '-N', '-nc', '-r', or '-p', 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. (This is also the behavior with ‘-nd’, even if ‘-r’ or ‘-p’ are in effect.)

If you run Wget without '-N', '-nc', '-r', or '-p', loading the same file in the same directory will save the original copy of the file, and the second copy will be named 'file. 1. If this file is uploaded again, the third copy will be named "file.2" and so on. (This is also the behavior with -nd, even if -r or -p is in effect.)

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 indicated "-Nc", this behavior is suppressed and Wget will refuse to download new copies ‘ file’. So "no-clobber" is actually wrong in this mode - it is not clobber that is prevented (since the numeric suffixes already prevent anti-aliasing), but rather prevents multiple versions from being stored.

When running Wget with ' -r’Or‘ -p’, But without’ -N’, ‘-nd’, 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 starting Wget with ' -r' or ' -p', but without ' -N’, ‘-nd' or ' -nc', Re-downloading the file will cause the new copy to simply overwrite the old one. Adding "-nc" will prevent this behavior, instead the original version will be kept and any new copies on the server will be ignored.

When running Wget with '-N', with or without '-r' or '-p', 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 ( see Time-Stamping). '-Nc' may not be specified at the same time as '-N'.

When running Wget with '-N', with or without '-r', or '-p', the decision to download or not download a newer copy of the file depends on the local and remote timestamp and file size (see Temporal Stamping ). "-Nc" may not be specified at the same time as "-N".

A combination with ‘-O’ / ’- output-document’ is only accepted if the given output file does not exist.

The combination with '-O' / '- output-document' is only accepted if the given output file does not exist.

Note that when ‘ -nc’Is specified, files with the suffixes’ .html ’or’ .htm ’will be loaded from the local disk and parsed as if they had been retrieved from the Web.

Please note that when specified "-Nc", files with ".html" or ".htm" suffixes will be downloaded from local disk and analyzed as if they were retrieved from the Internet.

‘—Backups = backups’

Before (over) writing a file, back up an existing file by adding a ‘.1’ suffix (‘_1’ on VMS) to the file name. Such backup files are rotated to ‘.2’, ‘.3’, and so on, up to backups (and lost beyond that).

Before (over) writing the file, back up the existing file by adding the ‘.1’ (‘_1’ on VMS) suffix to the file name. Such backup files are rotated to ".2", ".3", and so on, up to and including backups (and are lost for doing so).

‘-C’
‘—Continue’

Continue getting a partially-downloaded file. This is useful when you want to finish up a download started by a previous instance of Wget, or by another program. For instance:

Keep getting the partially downloaded file. This is useful when you want to complete a download started by a previous Wget instance or other program. For example:

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

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

If there is a file named ls-lR.Z in the current directory, Wget will assume that it is the first part of the remote file and ask the server to continue extracting at an offset equal to the length of the local file.

Note that you don’t need to specify this option if you just want the current invocation of Wget to retry downloading a file should the connection be lost midway through. This is the default behavior. ‘ -c’Only affects resumption of downloads started prior to this invocation of Wget, and whose local files are still sitting around.

Note that you do not need to specify this option if you just want the current Wget call to retry the file download if the connection is lost halfway. This is the default behavior. ‘ -c'Only affects resume downloads started before this Wget call, and whose local files are still sitting.

Without '-c', the previous example would just download the remote file to ls-lR.Z.1, leaving the truncated ls-lR.Z file alone.

Without -c, the previous example just loaded the remote file into ls-lR.Z.1, leaving the file with ls-lR.Z truncated.

If you use ‘ -c’On a non-empty file, and the server does not support continued downloading, Wget will restart the download from scratch and overwrite the existing file entirely.

If you are using ‘ -c'In a non-empty file, and the server does not support persistent downloads, Wget will restart the download from scratch and completely overwrite the existing file.

Beginning with Wget 1.7, if you use ' -c’On a file which is of equal size as the one on the server, Wget will refuse to download the file and print an explanatory message. The same happens when the file is smaller on the server than locally (presumably because it was changed on the server since your last download attempt) -because “continuing” is not meaningful, no download occurs.

Since Wget 1.7, if you use " -c"In a file with the same size as the one on the server, Wget will refuse to download the file and print an explanatory message. The same thing happens when the file is smaller on the server than it is locally (presumably because it has been modified on the server since the last download attempt), because “continue” is meaningless, no download occurs.

On the other side of the coin, while using '-c', any file that's bigger on the server than locally will be considered an incomplete download and only (length (remote) - length (local)) bytes will be downloaded and tacked onto the end of the local file. This behavior can be desirable in certain cases-for instance, you can use ‘wget -c’ to download just the new portion that’s been appended to a data collection or log file.

On the other side of the coin, when using ‘-c’, any file that is larger on the server than locally will be considered a partial download and only (length (remote) length (local)) bytes will be downloaded and attached to the end of the local file. This behavior may be desirable in some cases, for example, you can use "wget ​​-c" to download only the new part that has been added to the data collection or log file.

However, if the file is bigger on the server because it’s been changed, as opposed to just appended to, you’ll end up with a garbled file. Wget has no way of verifying that the local file is really a valid prefix of the remote file. You need to be especially careful of this when using ‘-c’ in conjunction with ‘-r’, since every file will be considered as an “incomplete download” candidate.

However, if the file is larger on the server because it has been modified rather than just added, you will end up with a garbled file. Wget has no way of verifying that the local file is indeed a valid prefix for the remote file. You must be especially careful when using ‘-c’ in conjunction with ‘-r’, as each file will be considered a “partial download” candidate.

Another instance where you’ll get a garbled file if you try to use ’-c’ is if you have a lame HTTP proxy that inserts a “transfer interrupted” string into the local file. In the future a “rollback” option may be added to deal with this case.

Another example where you get a malformed file if you try to use "-c" is if you have a lame HTTP proxy that inserts the line "interrupt redirection" into a local file. In the future, a rollback option may be added to resolve this case.

Note that ‘ -c'Only works with FTP servers and with HTTP servers that support the Range header.

Note that ' -c'Only works with FTP servers and HTTP servers that support the Range header.

‘—Start-pos = OFFSET’

Start downloading at zero-based position OFFSET. Offset may be expressed in bytes, kilobytes with the ‘k’ suffix, or megabytes with the ‘m’ suffix, etc.

Start downloading at position zero OFFSET. The offset can be expressed in bytes, kilobytes with the "k" suffix, or megabytes with the "m" suffix, etc.

‘—Start-pos’ has higher precedence over ‘—continue’. When ‘—start-pos’ and ’—continue’ are both specified, wget will emit a warning then proceed as if ‘—continue’ was absent.

Server support for continued download is required, otherwise '—start-pos ’cannot help. See ‘-c’ for details.

'—Progress = type ’

Select the type of the progress indicator you wish to use. Legal indicators are “dot” and “bar”.

The “bar” indicator is used by default. It draws an ASCII progress bar graphics (a.k.a “thermometer” display) indicating the status of retrieval. If the output is not a TTY, the “dot” bar will be used by default.

Use '—progress = dot ’to switch to the“ dot ”display. It traces the retrieval by printing dots on the screen, each dot representing a fixed amount of downloaded data.

The progress type can also take one or more parameters. The parameters vary based on the type selected. Parameters to type are passed by appending them to the type sperated by a colon (:) like this: ‘—progress = type: parameter1: parameter2’.

When using the dotted retrieval, you may set the style by specifying the type as ‘dot: style’. Different styles assign different meaning to one dot. 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 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). If mega is not enough then you can use the giga style-each dot represents 1M retrieved, there are eight dots in a cluster, and 32 dots on each line (so each line contains 32M).

With '—progress = bar ’, there are currently two possible parameters, force and noscroll.

When the output is not a TTY, the progress bar always falls back to “dot”, even if ‘—progress = bar’ was passed to Wget during invokation. This behavior can be overridden and the “bar” output forced by using the “force” parameter as ‘—progress = bar: force’.

By default, the 'bar' style progress bar scroll the name of the file from left to right for the file being downloaded if the filename exceeds the maximum length allotted for its display. In certain cases, such as with '—progress = bar: force ’, one may not want the scrolling filename in the progress bar. By passing the “noscroll” parameter, Wget can be forced to display as much of the filename as possible without scrolling through it.

Note that you can set the default style using the progress command in .wgetrc. That setting may be overridden from the command line. For example, to force the bar output without scrolling, use '—progress = bar: force: noscroll ’.

‘—Show-progress’

Force wget to display the progress bar in any verbosity.

By default, wget only displays the progress bar in verbose mode. One may however, want wget to display the progress bar on screen in conjunction with any other verbosity modes like ‘—no-verbose’ or ‘—quiet’. This is often a desired a property when invoking wget to download several small / large files. In such a case, wget could simply be invoked with this parameter to get a much cleaner output on the screen.

This option will also force the progress bar to be printed to stderr when used alongside the ‘—logfile’ option.

‘-N’
‘—Timestamping’

Turn on time-stamping. See Time-Stamping, for details.

Turn on timping. See Time-Stamping for details.

'—No-if-modified-since ’

Do not send If-Modified-Since header in ‘-N’ mode. Send preliminary HEAD request instead. This has only effect in ‘-N’ mode.

'—No-use-server-timestamps'

Don’t set the local file’s timestamp by the one on the server.

By default, when a file is downloaded, its timestamps are set to match those from the remote file. This allows the use of '—timestamping' on subsequent invocations of wget. However, it is sometimes useful to base the local file’s timestamp on when it was actually downloaded; for that purpose, the ‘—no-use-server-timestamps’ option has been provided.

‘-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. For example, you can use Wget to check your bookmarks:

wget -spider -force-html -i bookmarks.html
This feature needs much more work for Wget to get close to the functionality of real web spiders.

‘-T seconds’
'—Timeout = seconds ’

Set the network timeout to seconds seconds. This is equivalent to specifying ‘—dns-timeout’, ‘—connect-timeout’, and ‘—read-timeout’, all at the same time.

When interacting with the network, Wget can check for timeout and abort the operation if it takes too long. This prevents anomalies like hanging reads and infinite connects. The only timeout enabled by default is a 900-second read timeout. Setting a timeout to 0 disables it altogether. Unless you know what you are doing, it is best not to change the default timeout settings.

All timeout-related options accept decimal values, as well as subsecond values. For example, ‘0.1’ seconds is a legal (though unwise) choice of timeout. Subsecond timeouts are useful for checking server response times or for testing network latency.

‘—Dns-timeout = seconds’

Set the DNS lookup timeout to seconds seconds. DNS lookups that don’t complete within the specified time will fail. By default, there is no timeout on DNS lookups, other than that implemented by system libraries.

'—Connect-timeout = seconds ’

Set the connect timeout to seconds seconds. TCP connections that take longer to establish will be aborted. By default, there is no connect timeout, other than that implemented by system libraries.

'—Read-timeout = seconds ’

Set the read (and write) timeout to seconds seconds. The “time” of this timeout refers to idle time: if, at any point in the download, no data is received for more than the specified number of seconds, reading fails and the download is restarted. This option does not directly affect the duration of the entire download.

Of course, the remote server may choose to terminate the connection sooner than this option requires. The default read timeout is 900 seconds.

'—Limit-rate = amount ’

Limit the download speed to amount bytes per second. Amount may be expressed in bytes, kilobytes with the ‘k’ suffix, or megabytes with the ‘m’ suffix. For example, ‘—limit-rate = 20k’ will limit the retrieval rate to 20KB / s. This is useful when, for whatever reason, you don’t want Wget to consume the entire available bandwidth.

This option allows the use of decimal numbers, usually in conjunction with power suffixes; for example, ‘—limit-rate = 2.5k’ is a legal value.

Note that Wget implements the limiting by sleeping the appropriate amount of time after a network read that took less time than specified by the rate. Eventually this strategy causes the TCP transfer to slow down to approximately the specified rate. However, it may take some time for this balance to be achieved, so don’t be surprised if limiting the rate doesn’t work well with very small files.

‘-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. The waiting interval specified by this function is influenced by -random-wait, which see.

‘—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.

By default, Wget will assume a value of 10 seconds.

‘—Random-wait’

Some web sites may perform log analysis to identify retrieval programs such as Wget by looking for statistically significant similarities in the time between requests. This option causes the time between requests to vary between 0.5 and 1.5 * wait seconds, where wait was specified using the ‘—wait’ option, in order to mask Wget’s presence from such analysis.

A 2001 article in a publication devoted to development on a popular consumer platform provided code to perform this analysis on the fly. Its author suggested blocking at the class C address level to ensure automated retrieval programs were blocked despite changing DHCP-supplied addresses.

The ‘—random-wait’ option was inspired by this ill-advised recommendation to block many unrelated users from a web site due to the actions of one.

‘—No-proxy’

Don’t use proxies, even if the appropriate * _proxy environment variable is defined.

See Proxies, for more information about the use of proxies with Wget.

'-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 https://example.com/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.

'—No-dns-cache'

Turn off caching of DNS lookups. Normally, Wget remembers the IP addresses it looked up from DNS so it doesn’t have to repeatedly contact the DNS server for the same (typically small) set of hosts it retrieves from. This cache exists in memory only; a new Wget run will contact DNS again.

However, it has been reported that in some situations it is not desirable to cache host names, even for the duration of a short-running application like Wget. With this option Wget issues a new DNS lookup (more precisely, a new call to gethostbyname or getaddrinfo) each time it makes a new connection. Please note that this option will not affect caching that might be performed by the resolving library or by an external caching layer, such as NSCD.

If you don’t understand exactly what this option does, you probably won’t need it.

'—Restrict-file-names = modes ’

Change which characters found in remote URLs must be escaped during generation of local filenames. Characters that are restricted by this option are escaped, i.e. replaced with ‘% HH’, where ‘HH’ is the hexadecimal number that corresponds to the restricted character. This option may also be used to force all alphabetical cases to be either lower- or uppercase.

By default, Wget escapes the characters that are not valid or safe as part of file names on your operating system, as well as control characters that are typically unprintable. This option is useful for changing these defaults, perhaps because you are downloading to a non-native partition, or because you want to disable escaping of the control characters, or you want to further restrict characters to only those in the ASCII range of values.

The modes are a comma-separated set of text values. The acceptable values ​​are ‘unix’, ‘windows’, ‘nocontrol’, ‘ascii’, ‘lowercase’, and ‘uppercase’. The values ​​‘unix’ and ‘windows’ are mutually exclusive (one will override the other), as are ‘lowercase’ and ‘uppercase’. Those last are special cases, as they do not change the set of characters that would be escaped, but rather force local file paths to be converted either to lower- or uppercase.

When “unix” is specified, Wget escapes the character ’/’ and the control characters in the ranges 0–31 and 128–159. This is the default on Unix-like operating systems.

When “windows” is given, Wget escapes the characters ‘\’, ‘|’, ‘/’, ‘:’, ‘?’, ‘” ’,‘ * ’,‘<’, ‘>', And the control characters in the ranges 0-31 and 128-159. In addition to this, Wget in Windows mode uses '+' instead of ':' to separate host and port in local file names, and uses '@' instead of '?' To separate the query portion of the file name from the rest ... Therefore, a URL that would be saved as ‘www.xemacs.org:4300/search.pl?input=blah’ in Unix mode would be saved as ‘www.xemacs.org + 4300 / sear [email protected]= blah 'in Windows mode. This mode is the default on Windows.

If you specify ‘nocontrol’, then the escaping of the control characters is also switched off. This option may make sense when you are downloading URLs whose names contain UTF-8 characters, on a system which can save and display filenames in UTF-8 (some possible byte values ​​used in UTF-8 byte sequences fall in the range of values ​​designated by Wget as “controls”).

The ‘ascii’ mode is used to specify that any bytes whose values ​​are outside the range of ASCII characters (that is, greater than 127) shall be escaped. This can be useful when saving filenames whose encoding does not match the one used locally.

‘-4’
'—Inet4-only'
‘-6’
‘—Inet6-only’

Force connecting to IPv4 or IPv6 addresses. With ‘—inet4-only’ or ’-4’, Wget will only connect to IPv4 hosts, ignoring AAAA records in DNS, and refusing to connect to IPv6 addresses specified in URLs. Conversely, with ‘—inet6-only’ or ’-6’, Wget will only connect to IPv6 hosts and ignore A records and IPv4 addresses.

Neither options should be needed normally. By default, an IPv6-aware Wget will use the address family specified by the host’s DNS record. If the DNS responds with both IPv4 and IPv6 addresses, Wget will try them in sequence until it finds one it can connect to. (Also see —prefer-family option described below.)

These options can be used to deliberately force the use of IPv4 or IPv6 address families on dual family systems, usually to aid debugging or to deal with broken network configuration. Only one of ‘—inet6-only’ and ‘—inet4-only’ may be specified at the same time. Neither option is available in Wget compiled without IPv6 support.

'—Prefer-family = none / IPv4 / IPv6'

When given a choice of several addresses, connect to the addresses with specified address family first. The address order returned by DNS is used without change by default.

When selecting multiple addresses, connect to addresses with the specified address family first. The address order returned by DNS is unchanged by default.

This avoids spurious errors and connect attempts when accessing hosts that resolve to both IPv6 and IPv4 addresses from IPv4 networks. For example, ‘www.kame.net’ resolves to ‘2001: 200: 0: 8002: 203: 47ff: fea5: 3085’ and to ‘203.178.141.194’. When the preferred family is IPv4, the IPv4 address is used first; when the preferred family is IPv6, the IPv6 address is used first; if the specified value is none, the address order returned by DNS is used without change.

This avoids false errors and connection attempts when accessing hosts that allow IPv6 and IPv4 addresses from IPv4 networks. For example, "www.kame.net" resolves to "2001: 200: 0: 8002: 203: 47ff: fea5: 3085" and "203.178.141.194". When the preferred family is IPv4, the IPv4 address is used first; when the preferred family is IPv6, the IPv6 address is used first; if the specified value is none, the address returned by DNS is used unchanged.

Unlike ‘-4’ and ‘-6’, this option doesn’t inhibit access to any address family, it only changes the order in which the addresses are accessed. Also note that the reordering performed by this option is stable-it doesn’t affect order of addresses of the same family. That is, the relative order of all IPv4 addresses and of all IPv6 addresses remains intact in all cases.

Unlike "-4" and "-6", this parameter does not prohibit access to any address family, it changes the order of access to addresses. Also note that the reordering performed by this option is stable — it does not affect the order of addresses in the same address family. That is, the relative ordering of all IPv4 addresses and all IPv6 addresses remains intact in all cases.

‘—Retry-connrefused’

Consider “connection refused” a transient error and try again. Normally Wget gives up on a URL when it is unable to connect to the site because failure to connect is taken as a sign that the server is not running at all and that retries would not help. This option is for mirroring unreliable sites whose servers tend to disappear for short periods of time.

Note that the "connection was refused" transient error and try again. Typically, Wget will give up the url when it cannot connect to the site, because the connection rejection is taken as a sign that the server is not running at all and that trying will not help. This option is for mirroring untrusted sites whose servers tend to disappear within short periods of time.

‘—User = user’
'—Password = password ’

Specify the username user and password password for both FTP and HTTP file retrieval. These parameters can be overridden using the ' —Ftp-user’And‘ —Ftp-password’Options for FTP connections and the’ —http-user ’and’ —http-password ’options for HTTP connections.

Provide user password and user password to search for FTP and HTTP files. These parameters can be overridden using the options " —Ftp-user" and " —Ftp-password"For FTP connections and" -http-user "and" -http-password "for HTTP connections.

‘—Ask-password’

Prompt for a password for each connection established. Cannot be specified when ' —Password’Is being used, because they are mutually exclusive.

Request a password for everyone established connection... Cannot be specified when using " —Password"Because they are mutually exclusive.

‘—No-iri’

Turn off internationalized URI (IRI) support. Use ‘—Iri’ to turn it on. IRI support is activated by default.

Disable Internationalized URI (IRI) support. Use "—Iri" to turn it on. IRI support is enabled by default.

You can set the default state of IRI support using the iri command in .wgetrc. That setting may be overridden from the command line.

You can set the default IRI state using the iri command in .wgetrc. This parameter can be overridden from the command line.

'—Local-encoding = encoding'

Force Wget to use encoding as the default system encoding. That affects how Wget converts URLs specified as arguments from locale to UTF-8 for IRI support.

Force Wget to use the system default encoding. This affects how Wget converts URLs given as arguments from the locale to UTF-8 for IRI support.

Wget use the function nl_langinfo () and then the CHARSET environment variable to get the locale. If it fails, ASCII is used.

Wget uses the nl_langinfo () function and then the CHARSET environment variable to get the locale. If this fails, ASCII is used.

You can set the default local encoding using the local_encoding command in .wgetrc. That setting may be overridden from the command line.

You can set the default local encoding using the local_encoding command in .wgetrc. This parameter can be overridden from the command line.

'—Remote-encoding = encoding'

Force Wget to use encoding as the default remote server encoding. That affects how Wget converts URIs found in files from remote encoding to UTF-8 during a recursive fetch. This options is only useful for IRI support, for the interpretation of non-ASCII characters.

Force Wget to use the encoding as the default encoding of the remote server. This affects how Wget converts URIs found in remote-encoded files to UTF-8 during recursive fetch. These options are only useful for IRI support, for interpreting non-ASCII characters.

For HTTP, remote encoding can be found in HTTP Content-Type header and in HTML Content-Type http-equiv meta tag.

For HTTP, remote encoding can be found in the HTTP Content-Type header and in the http-equiv HTML Content-Type meta tag.

You can set the default encoding using the remoteencoding command in .wgetrc. That setting may be overridden from the command line.

You can set the default encoding using the remoteencoding command in .wgetrc. This parameter can be overridden from the command line.

‘—Unlink’

Force Wget to unlink file instead of clobbering existing file. This option is useful for downloading to the directory with hardlinks.

Make Wget disable the file rather than clog the existing file. This option is useful for uploading to a directory with hard links.