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commandlinefu.com is the place to record those command-line gems that you return to again and again.

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May 19, 2015 - A Look At The New Commandlinefu
I've put together a short writeup on what kind of newness you can expect from the next iteration of clfu. Check it out here.
March 2, 2015 - New Management
I'm Jon, I'll be maintaining and improving clfu. Thanks to David for building such a great resource!
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Psst. Open beta.

Wow, didn't really expect you to read this far down. The latest iteration of the site is in open beta. It's a gentle open beta-- not in prime-time just yet. It's being hosted over at UpGuard (link) and you are more than welcome to give it a shot. Couple things:

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  • » If you wish to use your user account, you will probably need to reset your password.
Your feedback is appreciated via the form on the beta page. Thanks! -Jon & CLFU Team

All commands from sorted by
Terminal - All commands - 12,394 results
for f in *;do case "$(echo $f|sed "s/.*\.\([a-z\.]*\)/\1/g")" in zip)unzip -qqo $f&&rm $f;;tar.gz|tar.bz2)tar xf $f&&rm $f;;rar)unrar e -o+ -r -y $f&&rm $f;;7z)7z e -qqo $f;;esac;done
2009-08-17 03:50:50
User: matthewbauer
-2

This will unarchive the entire working directory. Good for torrents (I don't know why they put each file into a seperate archive).

/Applications/Google\ Chrome.app/Contents/MacOS/Google\ Chrome --proxy-server=socks5://HOST:PORT
curl -Ls "http://support.dell.com/support/DPP/Index.aspx?c=us&cs=08W&l=en&s=biz&ServiceTag=$(dmidecode -s system-serial-number)"|egrep -i '>Your Warranty<|>Product Support for'|html2text -style pretty|egrep -v 'Request|View'|perl -pane 's/^(\s+|\})//g;'
2011-02-18 22:29:05
User: din7
Functions: egrep perl
-2

The dates in the output are Start Date, End Date, Days Remaining in warranty, respectively. This will only work if you are running it on a dell machine. You can substitute the dmidecode command with a service tag if you are not using a dell. Also, you have to either allow your user to run sudo dmidecode with no password or run this command as root.

curl -s http://checkrealip.com/ | grep "Current IP Address" | cut -d ' ' -f 4
:rm 1
_llines=100; while [ $_llines -gt 1 ]; do echo $_llines; _llines=$(($_llines-1)); done
2009-04-29 00:19:45
User: romulusnr
Functions: echo
-2

You've opened a terminal window and you've connected off to a remote host that didn't pick up your terminal size, and all your curses and paging apps are screwed up as a result. You need to quickly determine how many lines are in your current terminal view (to feed into "stty rows X").

diff -qr /dirA /dirB
mount -o auto -t ntfs /dev/hda1 /windows
2009-02-16 10:45:06
User: RonaldConco
Functions: mount
-2

if the command is successful , you will get no output - only if an error has occurred will there be output

video=$(ls /tmp | grep -e Flash\w*); ffmpeg -i /tmp/$video -f mp3 -ab 192k ~/ytaudio.mp3
find . -name '*.txt' | grep -v '\.lzma$' | xargs -n 1 lzma -f -v -3
rm **/*.htm
2010-11-25 17:28:55
Functions: rm
Tags: find rm
-2

expands through shell and not find

but may hits the limit of max argument size for rm

(thus: for f in **/*.htm;do rm $f;done

but then I prefer the find command ;)

for i in $(ls /the/path); do du -hs /the/path/$i; done
watch w
for domain in `cat list_of_domains.txt`; do echo $domain; whois $domain >> output.txt; done
2010-02-15 17:13:45
User: pathcl
Functions: echo whois
-2

Outputs multiple whois from a plain text file.

vim -p file1 file2 [...]
lynx -useragent=Opera -dump 'http://www.facebook.com/ajax/typeahead_friends.php?u=4&__a=1' |gawk -F'\"t\":\"' -v RS='\",' 'RT{print $NF}' |grep -v '\"n\":\"' |cut -d, -f2
cat /var/log/secure | grep smtp | awk '{print $9}' | cut -f2 -d= | sort | uniq -c | sort -n | tail
2009-03-30 15:49:54
User: empulse
Functions: awk cat cut grep sort uniq
-2

Searches /var/log/secure for smtp connections then lists these by number of connections made and hosts.

tcpdump -n -v tcp or udp or icmp and not port 22
man $(ls -1 /usr/share/man/man?/ | shuf -n1 | cut -d. -f1)
2010-08-20 23:36:10
User: dooblem
Functions: cut ls man
Tags: man sort shuf
-2

Another one.

Maybe not the quicker because of the sort command, but it will also look in other man sections.

updated with goodevilgenius 'shuf' idea

gconf-editor /apps/evolution/mail/composer/no_signature_delim false
for file in $( git ls-files ); do echo $file; touch -t $(git --no-pager log --date=local -1 --format="%ct" $file | php -r 'echo @date( "YmdHi.s", trim( file_get_contents( "php://stdin" ) ) );') $file; done
cat file1.txt | uniq > file2.txt
wget -O - 'https://USERNAMEHERE:[email protected]/mail/feed/atom' --no-check-certificate
2010-09-26 14:47:13
User: PLA
Functions: wget
-3

I use this command in my Conky script to display the number of messages in my Gmail inbox and to list the from: and subject: fields.

sed -ne '/^Package: \(.*\)/{s//\1/;h;};/^Installed-Size: \(.*\)/{s//\1/;G;s/\n/ /;p;}' /var/lib/dpkg/status | sort -rn
2009-10-19 19:01:17
User: arcege
Functions: sed sort
-3

Use the hold space to preserve lines until data is needed.

find . | xargs grep -l "FOOBAR" | awk '{print "rm -f "$1}' > doit.sh
2014-04-06 15:48:41
User: sergeylukin
Functions: awk find grep xargs
Tags: awk find grep
-3

After this command you can review doit.sh file before executing it.

If it looks good, execute: `. doit.sh`