Difference between revisions of "Wget"

Latest revision as of 07:18, 13 September 2021

wget — The non-interactive network downloader.

Usage

• Simple download:

$ wget http://www.example.com/index.html

• Download a file and store it locally using a different file name:

$ wget -O example.html http://www.example.com/index.html

• Background download:

$ wget -b https://www.kernel.org/pub/linux/kernel/v4.x/linux-4.0.4.tar.gz
$ tail -f wget-log  # <- monitor download

The above command is useful when you initiate a download via a remote machine. This will start downloading in background, so that you can disconnect the terminal once the command is issued.

• Mirror an entire web site:

$ wget -m http://www.example.com

• Mirror an entire subdirectory of a web site (with no parent option in case of backlinks):

$ wget -mk -w 20 -np http://example.com/foo/

• Download all pages from a site and the pages the site links to (one-level deep):

$ wget -H -r --level=1 -k -p http://www.example.com

• Resume large file download:

$ wget -c --output-document=MIT8.01F99-L01.mp4 "https://www.youtube.com/watch?v=X9c0MRooBzQ"

• Schedule hourly downloads of a file

$ wget --output-document=traffic_$(date +\%Y\%m\%d\%H).gif "http://sm3.sitemeter.com/YOUR_CODE"

• Automatically download music (by Jeff Veen):

$ wget -r -l1 -H -t1 -nd -N -np -A.mp3 -erobots=off -i mp3_sites.txt

where mp3_sites.txt lists your favourite (legal) download sites.

#~OR~
$ wget -r --level=1 -H --timeout=1 -nd -N -np --accept=mp3 -e robots=off -i musicblogs.txt

• Download all mp3's listed in an html page (source):

$ wget -r -l1 -H -t1 -nd -N -np -A.mp3 -erobots=off [url of website]
#-r: recursive
#-l1: depth = 1
#-H: span hosts
#-t1: try once
#-nd: no heirarchy of directories
#-N: turn on time-stamping
#-np: do not ascend to parents
#-A.mp3: accept only mp3 files
#-erobots=off: ignore robots.txt

• Crawl a website and generate a log file of any broken links:

$ wget --spider -o wget.log -e robots=off --wait 1 -r -p http://www.example.com/

• Force wget to mimic a browser's user-agent (e.g., http://whatsmyuseragent.com/):

$ wget --user-agent="Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:38.0) Gecko/20100101 Firefox/38.0" https://www.kernel.org/pub/linux/kernel/v4.x/linux-4.0.4.tar.gz

• Limit download speed/rate:

$ wget --limit-rate=300k https://www.kernel.org/pub/linux/kernel/v4.x/linux-4.0.4.tar.gz

• Get headers:

$ wget -SO /dev/null xtof.ch
--2021-09-13 00:14:04--  http://xtof.ch/
Resolving xtof.ch (xtof.ch)... 1.2.3.4
Connecting to xtof.ch (xtof.ch)|1.2.3.4|:80... connected.
HTTP request sent, awaiting response... 
  HTTP/1.1 200 OK
  Date: Mon, 13 Sep 2021 07:14:04 GMT
  Server: Apache/2.4.37 (centos)
  Last-Modified: Tue, 28 Jul 2020 23:13:16 GMT
  ETag: "d2-5ab88958ae676"
  Accept-Ranges: bytes
  Content-Length: 210
  Keep-Alive: timeout=5, max=100
  Connection: Keep-Alive
  Content-Type: text/html; charset=UTF-8
Length: 210 [text/html]
Saving to: ‘/dev/null’

Download multiple files

• Create variable that holds all URLs and then using "BASH for loop" to download all files:

$ URLS="http://www.example.com/foo.tar.gz ftp://ftp.example.org/pub/bar.tar.gz"

• Use for loop as follows:

$ for u in $URLS; do wget $u; done

• You can also put a list of the URLs in a file and download using the -i option:

$ wget -i download.txt

Automating/scripting download process

#!/bin/sh
# wget-list: manage the list of downloaded files

# invoke wget-list without arguments
while [ $(find .wget-list -size +0) ]; do
  url=$(head -n1 .wget-list)
  wget -c ${url}
  sed -si 1d .wget-list
done

#!/bin/sh
# wget-all: process .wget-list in every subdirectory
# invoke wget-all without arguments

find -name .wget-list -execdir wget-list ';'

#!/bin/sh
# wget-dirs: run wget-all in specified directories
# invoking: wget-dirs <path-to-directory> ...

for dir in $*; do
  pushd ${dir}
  wget-all
  popd
done
wget-all

See also

• curl
• wput — tiny wget-like ftp-client for uploading files
• rsync
• axel
• prozilla

External links

• GNU Wget Manual — last update: 15-Jun-2005
• Geek to Live: Mastering Wget — via lifehacker.com
• wget: your ultimate command line downloader