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

Delete that bloated snippets file you've been using and share your personal repository with the world. That way others can gain from your CLI wisdom and you from theirs too. All commands can be commented on, discussed and voted up or down.


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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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Your feedback is appreciated via the form on the beta page. Thanks! -Jon & CLFU Team

All commands from sorted by
Terminal - All commands - 12,411 results
tune2fs -l $(df -P / | tail -n1 | cut -d' ' -f1 ) | grep 'Filesystem created:'
sudo ls ; sudo gedit /etc/passwd &
2010-10-05 21:01:34
User: aporter
Functions: ls sudo
-3

Take advantage of sudo keeping you authenticated for ~15 minutes.

The command is a little longer, but it does not require X (it can run on a headless server).

list the naming contexts of a directory server (no need to search in config files)
pon dsl-provider
grep -r "mystring" . |uniq | cut -d: -f1 | xargs sed -i "s/mystring//"
2009-04-09 12:49:01
Functions: cut grep sed uniq xargs
-3

Linux : these script enable you to edit multiple files and remove exact phrase from multiple files

ls .[!.]*
2009-09-29 13:50:13
User: danam
Functions: ls
-3

Although rm is protected against it, there are many commands that would wreak havoc on entering the obvious ".*" to address "dot-files". This sweet little expression excludes the dirs "." and ".." that cause the problems.

for ((i=0;i<5;i++)) ; do xpenguins & done
netstat -ie
grep -sq "" /etc/lsb-release && lsb_release -rd
2009-02-17 05:21:20
User: int19h
Functions: grep
-3

grep -sq "" filename && command

grep can be used in combination with && to run a command if a file exists.

for i in $(seq 5); do xpenguins & done
for i in `ps -ef | grep tracker | awk '{print $8}' | cut -d'/' -f4 | grep -v grep`; do killall -9 $i; done
2011-12-04 13:20:19
User: alienone
Functions: awk cut grep killall
-3

* ps -ef # list running processes

* grep string

* pull the process names from 8th field

* cut and delimiter '/'

* print 4th field

* get rid of trailing grep

* for loop killall -9 $i which is the process name

bvi [binary-file]
2009-03-24 15:30:50
User: haivu
Tags: edit
-3

bvi is your vi for binary editing. If your system does not have it, you can get it from

http://bvi.sourceforge.net/

xmlstarlet sel --net -t -o "Terrorist threat level: " -v [email protected] http://is.gd/wacQtQ
sudo /etc/acpi/sleep.sh sleep
2010-08-03 23:54:49
User: jmfork
Functions: sudo
Tags: sleep suspend
-3

It suspends to RAM: you always need your batteries for the RAM but it saves time as there is no need to slowly archive everything on your hard disk.

It works fine with me but if anyone has a nicer way, please contribute.

gpg -ab file.txt
gpg -ser [email protected]' file.txt
2011-09-17 04:51:02
User: kev
Functions: gpg
Tags: GPG
-3

-s

Make a signature.

-e

Encrypt data.

-r

Encrypt for user id name.

curl sputnick-area.net/ua
2011-10-24 09:57:50
User: sputnick
Tags: curl headers
-3

That's useful when you're doing some web scraping http://en.wikipedia.org/wiki/Web_scraping and you're trying to test your possibly fake user-agent.

grep -H -r "string" ./* >> grep.txt
cut -f 3 | uniq
wget http://checkip.dyndns.org/ -q -O - | grep -Eo '\<[[:digit:]]{1,3}(\.[[:digit:]]{1,3}){3}\>'
launchctl load /Library/LaunchDaemons/<plist config filename>.plist
2011-02-01 17:02:49
User: frank514
-3

to unload Daemon, use: launchctl unload /Library/LaunchDaemons/.plist

(cd /source/dir ; tar cvf - .)|(cd /dest/dir ; tar xvpf -)
openssl rand -base64 1000 | tr "[:upper:]" "[:lower:]" | tr -cd "[:alnum:]" | tr -d "lo" | cut -c 1-8 | pbcopy
2009-12-29 17:18:25
User: _eirik
Functions: cut tr
-3

eliminates "l" and "o" characters change length by changing 'x' here: cut -c 1-x

cat file.txt | sendmail -F myname -f [email protected] [email protected]
watch -n 1 cat /proc/net/wireless
2012-06-07 10:38:21
User: cantormath
Functions: cat watch
-3

Values will depend on the driver and the hardware specifics, so you need to refer to your driver documentation for proper interpretation of those values.