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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!

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

All commands from sorted by
Terminal - All commands - 12,364 results
ps -e | grep SearchStringHere
wget http://checkip.dyndns.org && clear && echo && echo My IP && egrep -o '([[:digit:]]{1,3}\.){3}[[:digit:]]{1,3}' index.html && echo && rm index.html
pgrep <name>
2010-02-28 22:59:33
User: alesplin
Tags: grep ps

You'll need to install proctools. MacPorts and Fink have this if you're running Mac OS X, check your Linux distribution's repositories if it isn't installed by default.

kill -9 `ps -u user -o "pid="`
wget http://tools.web4host.net/versions.tmp --quiet -O - | grep PHPMYADMIN | sed 's/PHPMYADMIN=//' | cat
2011-09-22 04:11:44
User: wr8cr8
Functions: grep sed wget

This is to get the latest version of phpMyAdmin to support scripts to download the latest version of the software if they want to automatically update.

alias lso="sudo lsof -i -T -n"
2009-05-14 04:01:05
Functions: alias

list what applications using what ports

who -m | sed 's/.*(\(.*\)).*/\1/'
2011-09-22 10:28:30
User: keymon
Functions: sed who

Will print the host associated with the current stdin.

This is useful to set the DOIT_SERVER for the doit remote execution agent ( http://www.chiark.greenend.org.uk/~sgtatham/doit/ )

export DOIT_HOST=$(who -m | sed 's/.*(\(.*\)).*/\1/')

Note that SSH_CLIENT variable can be lost if you use su or sudo (if set to reset vars)

telnet <ip> <port>
2009-02-12 19:11:03
User: leprasmurf
Functions: telnet

Telnet will make a tcp connection to a remote ip/port to test connectivity. If it times out, it's not reaching the host (maybe the firewall is blocking it). If connection is refused, it's reaching the host, but either the service is not listening on that port, or it's locked.

RANGE=500;number=$RANDOM let "number %= $RANGE"; echo "Random number less than $RANGE --- $number"
lynx -dump http://www.domain.com | grep http| awk '{print $2 }'
firefox -ProfileManager -no-remote
2010-10-08 14:40:18

If you need to create a profile and are already running Firefox, you don't need to close it to do it. Also, if you don't know the exact name of the profile, this would allow you to pick from a list.

tail -f /var/log/messages
2009-02-12 19:30:33
User: nicdev
Functions: tail

Use this command to see logs update in real time

echo "12345,12346" |sed -e's/ //'|tr "," "\n"| while read line; do echo -n $line" "; svn log -vr $line https://url/to/svn/repository/|grep "/"|head -1|cut -d"/" -f2; done
current_dir=$(cd $(dirname $BASH_SOURCE);pwd)
2011-04-18 09:24:14
User: xeor
Functions: cd dirname

I think this is the cleanest way of getting the current working directory of a script. It also works on osx, Linux, and probably bsd as well..

sudo lsof -iTCP:25
ps -ef | grep APP | awk '/grep/!{print$2}' | xargs -i kill {}
2009-02-05 16:10:05
User: hooobs
Functions: awk grep kill ps xargs

Probably posted previously, I use this all the time to find and kill a process for "APP". Simply replace "APP" with the name of the process you're looking to kill.

2012-04-16 21:18:27
User: khopesh
Functions: cd
Tags: cd

This is like `cd -` but doesn't echo the new directory name, which is preferable (to me) for an alias, e.g.

alias cdo="cd $OLDPWD"
pkill -f foo
2009-02-05 16:12:53
User: archlich

Be careful when issuing this command, it may kill unwanted processes!

To only search on the process name don't use the argument -f, pkill foo

for x in *.dat;do sort -k 3 $x >tmp && mv -f tmp $x;done
2010-07-07 07:57:37
User: rajarshi
Functions: mv sort
Tags: sorting

We normally get tasks in which one has to sort a data file according to some column. For a single file say foo, we would use

sort -k 3 foo >tmp && tmp foo

The for loop is useful when we have to do it on a number of files.

yes 1 | fdupes -rd $folder
2011-06-02 18:15:24
User: torrid
Functions: yes
Tags: deduplicate

This command deletes all but the first occurrence of a duplicate file in one or more folders.

nautilus "$pwd"
awk '{print(substr($0,1,5))}' file
2009-10-05 18:58:49
Functions: awk

Consider this file :




with awk

hello to


I can use awk substring to laminate words :







Similar to http://www.commandlinefu.com/commands/view/2000/laminate-files-line-by-line

cut -d: -f1 /etc/passwd | sort
lynx -dump http://domaim.com | egrep -o -e 'http://[/0-9a-z.]+html'
netstat -lntp