What's this?

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.

Get involved!

You can sign-in using OpenID credentials, or register a traditional username and password.

First-time OpenID users will be automatically assigned a username which can be changed after signing in.

Universal configuration monitoring and system of record for IT.

Stay in the loop…

Follow the Tweets.

Every new command is wrapped in a tweet and posted to Twitter. Following the stream is a great way of staying abreast of the latest commands. For the more discerning, there are Twitter accounts for commands that get a minimum of 3 and 10 votes - that way only the great commands get tweeted.

» http://twitter.com/commandlinefu
» http://twitter.com/commandlinefu3
» http://twitter.com/commandlinefu10

Subscribe to the feeds.

Use your favourite RSS aggregator to stay in touch with the latest commands. There are feeds mirroring the 3 Twitter streams as well as for virtually every other subset (users, tags, functions,…):

Subscribe to the feed for:



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!

Top Tags



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:

  • » The open beta is running a copy of the database that will not carry over to the final version. Don't post anything you don't mind losing.
  • » 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

Commands using egrep from sorted by
Terminal - Commands using egrep - 197 results
svn info | grep '^URL:' | egrep -o '(tags|branches)/[^/]+|trunk' | egrep -o '[^/]+$'
2009-04-09 20:08:45
User: isaacs
Functions: egrep grep info
Tags: svn grep

Get the svn info, grep for the "URL" of the repository, pull out the tag/branch/trunk, and then just show the helpful/meaningful bit.

u=`curl -d 'dl.start=Free' $(curl $1|perl -wpi -e 's/^.*"(http:\/\/rs.*)" method.*$/$1/'|egrep '^http'|head -n1)|grep "Level(3) \#2"|perl -wpi -e 's/^.*(http:\/\/rs[^\\\\]*).*$/$1/'`;sleep 60;wget $u
svn status | egrep '^(M|A)' | egrep -o '[^MA\ ].*$'
2009-03-27 05:18:24
User: isaacs
Functions: egrep
Tags: svn

This is useful for piping to other commands, as well:

svn status | egrep '^(M|A)' | egrep -o '[^MA\ ].*$' | xargs $EDITOR
netstat -antuwp | egrep "(^[^t])|(^tcp.*LISTEN)"
alias myip='curl -s www.wieistmeineip.de | egrep -o "[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}"'
curl -Is slashdot.org | egrep '^X-(F|B|L)' | cut -d \- -f 2
lsof | egrep "^COMMAND|deleted"
2009-03-12 23:11:26
User: jyoder
Functions: egrep

If your customer deletes a file that is still in use by a process, that space does not get freed up (will not show up in df) until that process either closes the file on its own, or is killed.

alias lh='ls -a | egrep "^\."'
find . -name "*.php" | xargs egrep -i -s 'specialFunction' > searchresult.txt
2009-02-23 15:25:49
User: tb323
Functions: egrep find xargs

Will search recursively and output the searchResult.txt in the same folder you are located.

for x in `psql -e\l | awk '{print $1}'| egrep -v "(^List|^Name|\-\-\-\-\-|^\()"`; do pg_dump -C $x | gzip > /var/lib/pgsql/backups/$x-nightly.dmp.gz; done
2009-02-21 15:21:09
User: f4nt
Functions: awk egrep gzip

Ran as the postgres user, dumps each database individually. It dumps with the create statements as well, so you can just 'zcat $x-nightly.dmp.gz | psql' to reimport/recreate a database from a backup.

egrep 'string1|string2' file
2009-02-20 20:41:33
User: jcgam69
Functions: egrep

search file for string1 or string2

ps -eo stat,pid,user,command | egrep "^STAT|^D|^R"
2009-02-20 19:00:17
User: jyoder
Functions: egrep ps

Want to know why your load average is so high? Run this command to see what processes are on the run queue. Runnable processes have a status of "R", and commands waiting on I/O have a status of "D".

On some older versions of Linux may require -emo instead of -eo.

On Solaris: ps -aefL -o s -o user -o comm | egrep "^O|^R|COMMAND"

egrep '^[^#]' some_file
psg () { ps auxwww | egrep "$1|PID" | grep -v grep }
2009-02-18 23:37:35
User: mulad
Functions: egrep grep ps

Yet another ps grep function, but this one includes the column headings.

egrep -o '\b[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\b' access.log | sort -u
ls -l | egrep ^d
2009-02-08 22:21:55
User: ergut
Functions: egrep ls

This command would be useful when it is desirable to list only the directories. 'egrep' chooses only the lines that begin with 'd'.

pidof () { ps acx | egrep -i $@ | awk '{print $1}'; }
wget -qO - http://myip.dk/ | egrep -m1 -o '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}'
curl -s http://myip.dk/ | egrep -m1 -o '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}'
cd ~/.purple/logs/; egrep -ri "i can haz|pwn|l33t|w00|zomg" * | cut -d'/' -f 3 | sort | uniq | xargs -I {} echo "Note to self: ban user '{}'"
egrep -ie "<*HREF=(.*?)>" index.html | awk -F\" '{print $2}' | grep ://
ssh-keygen -l -f [pubkey] | awk '{print $2}' | tr -ds ':' '' | egrep -ie "[a-f0-9]{32}"