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Wget is a utility designed for retrieving binary documents across the Web, through the use of HTTP (Hyper Text Transfer Protocol) and FTP (File Transfer Protocol), and saving them to disk. Wget is non-interactive, which means it can work in the background, while the user is not logged in, unlike most of web browsers (thus you may start the program and log off, letting it do its work). Analyzing server responses, it distinguishes between correctly and incorrectly retrieved documents, and retries retrieving them as many times as necessary, or until a user-specified limit is reached. REST is used in FTP on hosts that support it. Proxy servers are supported to speed up the retrieval and lighten network load. Wget supports the use of initialization file .wgetrc.
Wget supports a full-featured recursion mechanism, through which you can retrieve large parts of the web, creating local copies of remote directory hierarchies. Of course, maximum level of recursion and other parameters can be specified. Infinite recursion loops are always avoided by hashing the retrieved data. All of this works for both HTTP and FTP.
The retrieval is conveniently traced with printing dots, each dot representing one kilobyte of data received. Builtin features offer mechanisms to tune which links you wish to follow (cf. -L, -D and -H).
http_proxy, ftp_proxy, no_proxy, WGETRC, HOME
Wget supports the use of initialization file .wgetrc. First a system-wide init file will be looked for (/usr/local/lib/wgetrc by default) and loaded. Then the user's file will be searched for in two places: In the environmental variable WGETRC (which is presumed to hold the full pathname) and $HOME/.wgetrc. Note that the settings in user's startup file may override the system settings, which includes the quota settings (he he).
The syntax of each line of startup file is simple:variable = value
Valid values are different for different variables. The complete set of commands is listed below, the letter after equation-sign denoting the value the command takes. It is on/off for on or off (which can also be 1 or 0), string for any string or N for positive integer. For example, you may specify "use_proxy = off" to disable use of proxy servers by default. You may use inf for infinite value (the role of 0 on the command line), where appropriate. The commands are case-insensitive and underscore-insensitive, thus DIr_Prefix is the same as dirprefix. Empty lines, lines consisting of spaces, or lines beginning with '#' are skipped.
Most of the commands have their equivalent command-line option, except some more obscure or rarely used ones. A sample init file is provided in the distribution, named sample.wgetrc.
accept/reject = stringSame as -A/-R.
add_hostdir = on/offEnable/disable host-prefixed hostnames. -nH disables it.
always_rest = on/offEnable/disable continuation of the retrieval, the same as -c.
base = stringSet base for relative URL-s, the same as -B.
convert links = on/offConvert non-relative links locally. The same as -k.
debug = on/offDebug mode, same as -d.
dir_mode = NSet permission modes of created subdirectories (default is 755).
dir_prefix = stringTop of directory tree, the same as -P.
dirstruct = on/offTurning dirstruct on or off, the same as -x or -nd, respectively.
domains = stringSame as -D.
follow_ftp = on/offFollow FTP links from HTML documents, the same as -f.
force_html = on/offIf set to on, force the input filename to be regarded as an HTML document, the same as -F.
ftp_proxy = stringUse the string as FTP proxy, instead of the one specified in environment.
glob = on/offTurn globbing on/off, the same as -g.
header = stringDefine an additional header, like --header.
http_passwd = stringSet HTTP password.
http_proxy = stringUse the string as HTTP proxy, instead of the one specified in environment.
http_user = stringSet HTTP user.
input = stringRead the URL-s from filename, like -i.
kill_longer = on/offConsider 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 = stringSet logfile, the same as -o.
login = stringYour user name on the remote machine, for FTP. Defaults to "anonymous".
mirror = on/offTurn mirroring on/off. The same as -m.
noclobber = on/offSame as -nc.
no_parent = on/offSame as --no-parent.
no_proxy = stringUse the string as the comma-separated list of domains to avoid in proxy loading, instead of the one specified in environment.
num_tries = NSet number of retries per URL, the same as -t.
output_document = stringSet the output filename, the same as -O.
passwd = stringYour password on the remote machine, for FTP. Defaults to email@example.com.
quiet = on/offQuiet mode, the same as -q.
quota = quotaSpecify the download quota, which is useful to put in /usr/local/lib/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 = NRecursion level, the same as -l.
recursive = on/offRecursive on/off, the same as -r.
relative_only = on/offFollow only relative links (the same as -L). Refer to section FOLLOWING LINKS for a more detailed description.
robots = on/offUse (or not) robots.txt file.
server_response = on/offChoose whether or not to print the HTTP and FTP server responses, the same as -S.
simple_host_check = on/offSame as -nh.
span_hosts = on/offSame as -H.
timeout = NSet timeout value, the same as -T.
timestamping = on/offTurn timestamping on/off. The same as -N.
use_proxy = on/offTurn proxy support on/off. The same as -Y.
verbose = on/offTurn verbose on/off, the same as -v/-nv.
Wget also support proxy. It can take proxy settings from the environment or they can be specified explicitly. Here is how to specify proxy settings via environment:
export http_proxy="http://www-proxy.mycompany.com:8081/" export https_proxy="https://www-proxy.mycompany.com:8081/"
If proxy has authentication you need also use two parameters (note the use minus sign not underscore):
Most of the URL conventions described in RFC1738 are supported. Two alternative syntaxes are also supported, which means you can use three forms of address to specify a file:
Normal URL (recommended form):
FTP only (ncftp-like): hostname:/dir/file
HTTP only (netscape-like):
You may encode your username and/or password to URL using
If you do not understand these syntaxes, just use the plain ordinary syntax with which you would call lynx or netscape. Note that the alternative forms are deprecated, and may cease being supported in the future.
There are quite a few command-line options for wget. Note that you do not have to know or to use them unless you wish to change the default behaviour of the program. For simple operations you need no options at all. It is also a good idea to put frequently used command-line options in .wgetrc, where they can be stored in a more readable form.
This is the complete list of options with descriptions, sorted in descending order of importance:
-h --helpPrint a help screen. You will also get help if you do not supply command-line arguments.
-V --versionDisplay version of wget.
-v --verboseVerbose output, with all the available data. The default output consists only of saving updates and error messages. If the output is stdout, verbose is default.
-q --quietQuiet mode, with no output at all.
-d --debugDebug output, and will work only if wget was compiled with -DDEBUG. Note that when the program is compiled with debug output, it is not printed unless you specify -d.
-i filename --input-file=filenameRead URL-s from filename, in which case no URL-s need to be on the command line. If there are URL-s both on the command line and in a filename, those on the command line are first to be retrieved. The filename need not be an HTML document (but no harm if it is) - it is enough if the URL-s 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 to the document or by specifying --base=url on the command-line.
-o logfile --output-file=logfileLog messages to logfile, instead of default stdout. Verbose output is now the default at logfiles. If you do not wish it, use -nv (non-verbose).
-a logfile --append-output=logfileAppend to logfile - same as -o, but appends to a logfile (or creating a new one if the old does not exist) instead of rewriting the old log file.
-t num --tries=numSet number of retries to num. Specify 0 for infinite retrying.
--follow-ftpFollow FTP links from HTML documents.
-c --continue-ftpContinue retrieval of FTP documents, from where it was left off. If you specify "wget -c ftp://sunsite.doc.ic.ac.uk/ls-lR.Z", and there is already a file named ls-lR.Z in the current directory, wget continue retrieval from the offset equal to the length of the existing file. Note that you do not need to specify this option if the only thing 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 when you want to continue retrieval of a file already halfway retrieved, saved by other FTP software, or left by wget being killed.
-g on/off --glob=on/offTurn FTP globbing on or off. By default, globbing will be turned on if the URL contains a globbing characters (an asterisk, e.g.). Globbing means you may use the special characters (wildcards) to retrieve more files from the same directory at once, like wget ftp://gnjilux.cc.fer.hr/*.msg. Globbing currently works only on UNIX FTP servers.
-e command --execute=commandExecute command, as if it were a part of .wgetrc file. A command invoked this way will take precedence over the same command in .wgetrc, if there is one.
-N --timestampingUse the so-called time-stamps to determine whether to retrieve a file. If the last-modification date of the remote file is equal to, or older than that of local file, and the sizes of files are equal, the remote file will not be retrieved. This option is useful for weekly mirroring of HTTP or FTP sites, since it will not permit downloading of the same file twice.
-F --force-htmlWhen input is read from a file, force it to be HTML. This enables you to retrieve relative links from existing HTML files on your local disk, by adding to HTML, or using --base.
-B base href --base=base hrefUse base href as base reference, as if it were in the file, in the form . Note that the base in the file will take precedence over the one on the command-line.
-r --recursiveRecursive web-suck. According to the protocol of the URL, this can mean two things. Recursive retrieval of a HTTP URL means that Wget will download the URL you want, parse it as an HTML document (if an HTML document it is), and retrieve the files this document is referring to, down to a certain depth (default 5; change it with -l). Wget will create a hierarchy of directories locally, corresponding to the one found on the HTTP server.
This option is ideal for presentations, where slow connections should be bypassed. The results will be especially good if relative links were used, since the pages will then work on the new location without change.
When using this option with an FTP URL, it will retrieve all the data from the given directory and subdirectories, similar to HTTP recursive retrieval.
You should be warned that invoking this option may cause grave overloading of your connection. The load can be minimized by lowering the maximal recursion level (see -l) and/or by lowering the number of retries (see -t).
-m --mirrorTurn on mirroring options. This will set recursion and time-stamping, combining -r and -N.
-l depth --level=depthSet recursion depth level to the specified level. Default is 5. After the given recursion level is reached, the sucking will proceed from the parent. Thus specifying -r -l1 should equal a recursion-less retrieve from file. Setting the level to zero makes recursion depth (theoretically) unlimited. Note that the number of retrieved documents will increase exponentially with the depth level.
-H --span-hostsEnable spanning across hosts when doing recursive retrieving. See -r and -D. Refer to FOLLOWING LINKS for a more detailed description.
-L --relativeFollow only relative links. Useful for retrieving a specific homepage without any distractions, not even those from the same host. Refer to FOLLOWING LINKS for a more detailed description.
-D domain-list --domains=domain-listSet 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 speeds things up, even if only one host is spanned. Refer to FOLLOWING LINKS for a more detailed description.
-A acclist / -R rejlist --accept=acclist / --reject=rejlistComma-separated list of extensions to accept/reject. For example, if you wish to download only GIFs and JPEGs, you will use -A gif,jpg,jpeg. If you wish to download everything except cumbersome MPEGs and .AU files, you will use -R mpg,mpeg,au.
-X list --exclude-directories listComma-separated list of directories to exclude from FTP fetching.
-P prefix --directory-prefix=prefixSet directory prefix ("." by default) to prefix. The directory prefix is the directory where all other files and subdirectories will be saved to.
-T value --timeout=valueSet the read timeout to a specified value. Whenever a read is issued, the file descriptor is checked for a possible timeout, which could otherwise leave a pending connection (uninterrupted read). The default timeout is 900 seconds (fifteen minutes).
-Y on/off --proxy=on/offTurn proxy on or off. The proxy is on by default if the appropriate environmental variable is defined.
-Q quota[KM] --quota=quota[KM]Specify download quota, in bytes (default), kilobytes or megabytes. More useful for rc file. See below.
-O filename --output-document=filenameThe documents will not be written to the appropriate files, but all will be appended to a unique file name specified by this option. The number of tries will be automatically set to 1. If this filename is `-', the documents will be written to stdout, and --quiet will be turned on. Use this option with caution, since it turns off all the diagnostics Wget can otherwise give about various errors.
-S --server-responsePrint the headers sent by the HTTP server and/or responses sent by the FTP server.
-s --save-headersSave the headers sent by the HTTP server to the file, before the actual contents.
--header=additional-headerDefine an additional header. You can define more than additional headers. Do not try to terminate the header with CR or LF.
--http-user --http-passwdUse these two options to set username and password Wget will send to HTTP servers. Wget supports only the basic WWW authentication scheme.
-ncDo not clobber existing files when saving to directory hierarchy within recursive retrieval of several files. This option is extremely useful when you wish to continue where you left off with retrieval. If the files are .html or (yuck) .htm, it will be loaded from the disk, and parsed as if they have been retrieved from the Web.
-nvNon-verbose - turn off verbose without being completely quiet (use -q for that), which means that error messages and basic information still get printed.
-ndDo 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).
-xThe opposite of -nd -- Force creation of a hierarchy of directories even if it would not have been done otherwise.
-nhDisable time-consuming DNS lookup of almost all hosts. Refer to FOLLOWING LINKS for a more detailed description.
-nHDisable host-prefixed directories. By default, http://fly.cc.fer.hr/ will produce a directory named fly.cc.fer.hr in which everything else will go. This option disables such behaviour.
--no-parentDo not ascend to parent directory.
-k --convert-linksConvert the non-relative links to relative ones locally.
Recursive retrieving has a mechanism that allows you to specify which links wget will follow.
Only relative linksWhen only relative links are followed (option -L), recursive retrieving will never span hosts. will never get called, and the process will be very fast, with the minimum strain of the network. This will suit your needs most of the time, especially when mirroring the output the output of *2html converters, which generally produce only relative links.
Host checkingThe 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), all URL-s that refer to the same host will be retrieved.
The problem with this options 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 hosts, or that fly.cc.fer.hr is the same as fly.cc.etf.hr. Whenever an absolute link is encountered, gethostbyname is called to check whether we are really on the same host. Although results of gethostbyname are hashed, so that it will never get called twice for the same host, it still presents a nuisance e.g. in the large indexes of difference hosts, when each of them has to be looked up. You can use -nh to prevent such complex checking, and then wget will just compare the hostname. Things will run much faster, but also much less reliable.
Domain acceptanceWith the -D option you may specify domains that will be followed. The nice thing about this option is that hosts that are not from those domains will not get DNS- looked up. Thus you may specify -Dmit.edu, just to make sure that nothing outside .mit.edu gets looked up . This is very important and useful. It also means that -D does not imply -H (it must be explicitly specified). Feel free to use this option, since it will speed things up greatly, with almost all the reliability of host checking of all hosts.
Of course, domain acceptance can be used to limit the retrieval to particular domains, but freely spanning hosts within the domain, but then you must explicitly specify -H.
All hostsWhen -H is specified without -D, all hosts are being spanned. It is useful to set the recursion level to a small value in those cases. Such option is rarely useful.
FTP The rules for FTP are somewhat specific, since they have to be. To have FTP links followed from HTML documents, you must specify -f (follow_ftp). If you do specify it, FTP links will be able to span hosts even if span_hosts is not set. Option relative_only (-L) has no effect on FTP. However, domain acceptance (-D) and suffix rules (-A/-R) still apply.
Wget will catch the SIGHUP (hangup signal) and ignore it. If the output was on stdout, it will be redirected to a file named wget-log_. This is also convenient when you wish to redirect the output of Wget interactively.$ wget http://www.ifi.uio.no/~larsi/gnus.tar.gz &Wget will not try to handle any signals other than SIGHUP. Thus you may interrupt Wget using ^C or SIGTERM.
$ kill -HUP %% # to redirect the output
Get URL http://fly.cc.fer.hr/:wget http://fly.cc.fer.hr/
Force non-verbose output:wget -nv http://fly.cc.fer.hr/
Unlimit number of retries:wget -t0 http://www.yahoo.com/
Create a mirror image of fly's web (with the same directory structure the original has), up to six recursion levels, with only one try per document, saving the verbose output to log file 'log':wget -r -l6 -t1 -o log http://fly.cc.fer.hr/
Retrieve from yahoo host only (depth 50):wget -r -l50 http://www.yahoo.com/
If we want to save the downloaded file with a different name than its default name, we can use ‘-O’ parameter with wget command to do so,$ 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
Replicate whole website
If you need to download all contents of a website, you can do so by using ‘--mirror’ parameter,$ wget --mirror -p --convert-links -P /home/dan xyz.com
Here, wget – mirror is command to download the website,
-p, will download all files necessary to display HTML files properly,
--convert-links, will convert links in documents for viewing,
-P /home/dan, will save the file in /home/dan directory.
Download only a certain type of files
To download only a file with certain format type, use ‘-r -A’ parameters,$ wget -r -A.txt Website_url
Exclude a certain file type
While downloading a website, if you don’t want to download a certain file type you can do so by using ‘- – reject’ parameter,$ wget --reject=png Website_url
Downloading file & storing with a different name
If we want to save the downloaded file with a different name than its default name, we can use '-O' parameter with wget command to do so,$ 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
Replicate whole website
If you need to download all contents of a website, you can do so by using '--mirror' parameter,$ wget --mirror -p --convert-links -P /home/dan xyz.com
Here, wget – mirror is command to download the website,
-p, will download all files necessary to display HTML files properly,
--convert-links, will convert links in documents for viewing,
-P /home/dan, will save the file in /home/dan directory.
Download only a certain type of files
To download only a file with certain format type, use '-r -A' parameters,$ wget -r -A.txt Website_url
Exclude a certain file type
While downloading a website, if you don't want to download a certain file type you can do so by using '- – reject' parameter,$ wget --reject=png Website_url
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Wget Command to Download a file and save it under different name
You may want to save the file under a different name. To do this, you can use the -O option like this:wget -O wordpress.zip https://wordpress.org/latest.zip
This will download and save the latest WordPress installation in your current directory under the name "wordpress.zip".3. Wget Command to Download a file and save it in specific directory
To download the file and save it in a different directory, you can use the -P option, for example:wget -P /opt/wordpress https://wordpress.org/latest.zip
This will download and store the file in the /opt/wordpress directory on your server.4. Wget Command to Set the download speed
If you happen to download a huge file which takes longer to complete, you can also limit the download speed to prevent wget from using the full possible bandwidth of your connection.
To limit the download speed to 300k, for example, you can use the following command:wget --limit-rate=300k https://wordpress.org/latest.zip5. Wget Command to Continue interrupted download
Sometimes, when you download a very big file which would take a longer time to complete, you may temporarily lose your internet connection and your download will get interrupted.
To avoid starting the whole download again, you can continue from where it got interrupted using the -c option:wget -c https://wordpress.org/latest.zip
If the download is interrupted, and you start the whole download again without the -c option, wget will append ".1" to the end of the filename because the filename with the previous name already exists.6. Wget Command to Download in background
For bigger files, you can also use the -b option, to download the file in the background.wget -b http://example.com/big-file.zip
The output will be written in the "wget-log" file in the same directory, and you can always check the status of the download with the following command:tail -f wget-log7. Wget Command to Increase retry attempts
If you are having issues with your internet connection, and your download is getting interrupted multiple times, you can increase the retry attempts to download the file with the -tries option:wget -tries=100 https://example.com/file.zip8. Wget Command to Download multiple files
If you want to download multiple files at the same time, you can create a text file (for example download.txt) where you place all the URLs of the files you wish to download. To create a text file do the following:touch download.txt
Then you can edit the file with nano, and enter all the URLs of all the files you want to download:nano download.txthttp://example.com/file1.zip http://example.com/file2.zip http://example.com/file3.zip
After you save the file, you can then use the -i option to download all the files stored in that text file:wget -i download.txt9. Wget Command to Download through FTP
You can also use wget to download a file directly through FTP using a set username and password, with the following command:wget --ftp-user=username --ftp-password=password ftp://url-to-ftp-file10. Wget Command to Download entire website
You can even use wget to download an entire website, which you can then view locally, offline, without the need of internet connection. To do this you can use the following comand:wget --mirror --convert-links --page-requisites ----no-parent -P /path/to/download https://example-domain.com
With -- mirror , you turn on all the options required for mirroring.
With –convert-links , you will convert all the links so they would work offline.
With –page-requisites , you download all the necessary files such as CSS style sheets and images required to properly display the pages offline.
With –no-parent , you can restrict the download only to a specific portion of the site.
Additionally, you can set the path to where we want to download the files with the -P command followed by the path to the directory.
We have covered some of the most common uses of wget command. To learn more about wget , you can always check its man page with the man wget command.
If you have a Linux VPS with us, all you have to do is ask our expert Linux admins to install wget on your server or to offer some advice on how to use the wget commands. They're available 24/7, and will be able to help you solve this issue.
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"Single-threaded downloading has its benefits, especially when Wget is concerned. Other download managers have internal databases to help them keep track of which parts of files are already downloaded. Wget gets this information simply by scanning a file's size. This means that Wget is able to continue downloading a file which another application started to download; most other download managers lack this feature. Usually I start by downloading a file with my browser, and if it is too large, I stop downloading and finish it later with Wget."
Command Line. Advanced users will be able to continue to access files from external ftp sites using the wget command.
Use the --proxy-user=USER --proxy-passwd=PASSWORD command line options.
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Wget - Wikipedia, the free encyclopedia
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Learn to use Wget command with 12 examples - LinuxTechLab
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Last modified: January 14, 2018