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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 - 12,354 results
kudzu -p
2009-05-12 10:34:59
Functions: kudzu
-2

Kudzu is available on CentOS, used for configuring and detecting new hardware device installed, is also usefull for device listing.

find . -type f -exec ls -s \{\} \; | sort -n
2010-06-02 11:03:31
User: Insti
Functions: find ls sort
-2

Finds all files below the current directory.

Orders the result from smallest to largest.

Good for finding the largest files in the tree.

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}"'
egrep -i "somepattern" `find . -type f -print`
VAR="foo" ; awk '{ print '"$VAR"' }'
2011-04-15 07:56:20
User: FRUiT
Functions: awk
Tags: bash awk print
-2

BASH: Print shell variable into AWK

kill -9 $$
2009-02-17 15:10:29
User: chanux
Functions: kill
-2

Kill -9 immediately kills the given process number. $$ is the process ID of the process you are in.

sed -n '/jan\|Jan\|JAN\|JAn\|jAn\|jAN\|jaN/p' data.txt > jan-only-data.txt
du -shc .[^.]* * | grep [MG]
2010-07-06 10:13:18
User: rubo77
Functions: du grep
-2

shows only folders, that are MB or GB in total size

links2 -dump http://checkip.dyndns.com| egrep -m1 -o '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}'
find . -type f -name '*' -exec md5sum '{}' + > hashes.txt
export PS1='[\[\e[36;1m\]\u@\[\e[32;1m\]\h \[\e[31;1m\]\w]# \[\e[0m\]'
echo 00:29:36 | sed s/:/*60+/g | bc
for a in $(ls /usr/sbin /usr/bin); do ps -fC $a;done|grep -v PPID
2015-04-27 18:15:56
User: knoppix5
Functions: grep ls ps
-2

Thanks to pooderbill for the idea :-)

wget -O- -q http://www.nomachine.com/download-package.php?Prod_Id=2067 | sed -n -e 'H;${x;s/\n/ /g;p;}' | sed -e "s/[Hh][Rr][Ee][Ff]=\"/\n/g" | cut -d "\"" -f1 | sort -u | grep deb$
complete -W "$(echo `cat ~/.ssh/known_hosts | cut -f 1 -d ' ' | sed -e s/,.*//g | uniq | grep -v "\["`;)" ssh
alias ':q'='exit'; alias ':e'='vim';
2012-08-12 12:35:10
User: expelledboy
Functions: alias
Tags: vim alias
-2

This was me just succumbing to the habits, but now I rarely use quit or vim directly, so beware! :)

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
-2

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
-2

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
-2

list what applications using what ports

who -m | sed 's/.*(\(.*\)).*/\1/'
2011-09-22 10:28:30
User: keymon
Functions: sed who
-2

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
-2

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"