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2011-03-12 - Confoo 2011 presentation
Slides are available from the commandlinefu presentation at Confoo 2011: http://presentations.codeinthehole.com/confoo2011/
2011-01-04 - Moderation now required for new commands
To try and put and end to the spamming, new commands require moderation before they will appear on the site.
2010-12-27 - Apologies for not banning the trolls sooner
Have been away from the interwebs over Christmas. Will be more vigilant henceforth.
2010-09-24 - OAuth and pagination problems fixed
Apologies for the delay in getting Twitter's OAuth supported. Annoying pagination gremlin also fixed.




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Terminal - All commands - 11,585 results
ps -u $USER |grep $1 | awk '{ print $1}'| xargs kill
2009-07-20 10:06:32
User: buffer
Functions: awk grep ps xargs

Well this can come handy , when you don't feel like playing with pid rather if you know

the process name say "firefox",it would kill it.The script given below would kill the process with its name given as first parameter , though not robust enough to notify that process doesn't exist , well if you know what you are doing that's wouldn't be a problem.:)





ps -u $USER |grep $1 | awk '{ print $1}'| xargs kill


echo 00:29:36 | nawk -F: '{seconds=($1*60)*60; seconds=seconds+($2*60); seconds=seconds+$3; print seconds}'
grep -lir "text to find" *
TZ=GMT date -d "1970/01/01 00:29:36" +%s
sed -i "s/\(\x09\{1,\}\)\|\( \{1,\}\)/ /g;s/\(\x09\{1,\}$\)\|\( \{1,\}$\)//g" brisati.txt
2011-12-12 10:24:03
User: knoppix5
Functions: sed

This command does the following:

- converts any sequence of multiple spaces/tabs to one space only

- completely removes any space(s)/tab(s) at the end of each line

(If spaces and tabs are mixed in a sequence i.e. [tab][tab][space][tab], you have to execute this command twice!)

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.

date -ud "1970/01/01 00:29:36" +%s
2011-11-01 17:02:46
User: frans
Functions: date
Tags: echo date time

uses the -u switch for UTC

Another way could be

echo $(($(date -ud "00:29:36" +%s)%86400))
sudo shutdown 3600 -P
2013-04-14 16:14:23
Functions: shutdown sudo

You can easily stop shutdowning process by CTRL+C

ifdata -pa eth0
ls -l | sed -e 's/--x/1/g' -e 's/-w-/2/g' -e 's/-wx/3/g' -e 's/r--/4/g' -e 's/r-x/5/g' -e 's/rw-/6/g' -e 's/rwx/7/g' -e 's/---/0/g'
date -j -v1d -v-0m -v-1d +'%m %d %Y'
2010-03-04 17:47:51
User: drewk
Functions: date

This produces a parseable output of the last day of the month in future or past. Change the '-v-0m' to be a month plus or minus from the current system time.

echo "$(od -An -N4 -tu4 /dev/urandom) % 5 + 1" | bc
(echo "" | xsel -o) ; (programa | wgetpaste -s dpaste | awk '{print $7}' | xsel -ai)
2010-03-05 09:31:30
User: dvinchi666
Functions: awk echo
Tags: pipes paste

manda la salida de un comando hacia un servicio de paste y coloca la url de ese paste en el portapapeles

wget -q -O - checkip.dyndns.org|sed -e 's/.*Current IP Address: //' -e 's/<.*$//'
echo -n "Press any key to continue..." && read
2009-11-06 22:49:46
User: matthewbauer
Functions: echo

This works on some other version of read.

tar -xfv archive.zip
2010-10-14 08:19:16
User: vxbinaca
Functions: tar

Simplicity tends to win out on commandlinefu.com Also, why type multiple filenames when range operators work too. Saves finger abuse and time and reduces the chances for mistakes.

sync; echo 3 > /proc/sys/vm/drop_caches
2011-04-26 21:12:06
User: renich
Functions: echo sync

It clears caches from memory. It works fine on CentOS and Fedora. It will show you how much memory you need, for real.

cowsay `fortune` | toilet --gay -f term
curl http://en.m.wikipedia.org/wiki/List_of_Internet_top-level_domains | grep "<tr valign=\"top\">" | awk -F">" '{ print $5 }' | awk -F"<" '{ print $1 }'
2012-12-24 21:00:36
User: sxiii
Functions: awk grep

Oneliner to get domain names list of all existing domain names (from wikipedia)

alias apt-get='sudo apt-get'
2009-02-10 22:45:49
User: mogsie
Functions: alias

apt-get must be run as root, and it is useless to run it as your own user. So just run it as root. Saves you the "sudo !!" every time you're adding a package.

unzip \*.zip
2009-03-26 02:36:28
User: tiagofischer
Tags: unzip

"unzip *.zip" doesn't work as expected, because unzip handle wildcards in a different way.

You just need to escape the wildcard or do in another way:

for f in *.zip; do unzip "$f"; done
2009-02-11 01:15:14
User: kongxx







_KERNEL=`uname -r | awk -F- '{print $1}'`

_GLIBC=`ls /lib/libc-*.so | awk -F- '/lib/ {print $2}' | awk -F. '{print $1"."$2}'`

_MEM=`cat /proc/meminfo | awk '/MemTotal/ {print $2 $3}'`

_CPU=`cat /proc/cpuinfo | grep 'cpu MHz' | awk '{print $4}'`

echo '=============================='







echo 'GLIBC ' $_GLIBC

echo 'MEM INFO ' $_MEM

echo 'CPU INFO ' $_CPU

echo '=============================='

alias ltr 'ls -altr'
2011-06-11 03:22:13
User: drb532
Functions: alias

Create an alias to list all contents of the current directory in "reverse" time order. Thus the last modified file will appear just above your next prompt. Useful for remembering where you left off modifying files in a folder or just noting recent changes.

csh format but bash syntax similar

unlink <linkname>
2009-03-12 01:52:24
User: topgun553
Functions: unlink

if you had a symbolic link called "oldLink" in the current folder then you would want to do

unlink oldLink