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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:

  • » 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 - 12,372 results
git remote | xargs -n 1 git push
pdftk A=1.pdf B=2.pdf C=3.pdf cat C A output CA.pdf
find -type l | xargs ls -l
du -sh /home/*|sort -rh|head -n 10
2012-09-12 11:54:06
User: toaster
Functions: du head sort
0

the -h option of du and sort (on appropriate distrib) makes output "Human" readable and still sorted by "reversed size" (sort -rh)

for host in $MYHOSTS; do ping -q -c3 $H 2>&1 1>/dev/null && ssh -o 'AllowedAuthe ntications publickey' $host 'command1; command2' & for count in 1 2 3 4 5; do sleep 1; jobs | wc -l | grep -q ^0\$ && continue; done; kill %1; done
2012-11-13 23:12:27
User: a8ksh4
Functions: grep host jobs kill ping sleep ssh wc
0

Execute commands serially on a list of hosts. Each ssh connection is made in the background so that if, after five seconds, it hasn't closed, it will be killed and the script will go on to the next system.

Maybe there's an easier way to set a timeout in the ssh options...

wget -O - "[PICASA ALBUM RSS LINK]" |sed 's/</\n</g' | grep media:content |sed 's/.*url='"'"'\([^'"'"']*\)'"'"'.*$/\1/' |awk -F'/' '{gsub($NF,"d/"$NF); print $0}'|wget -i -
dpkg-query --show --showformat='${Package;-50}\t${Installed-Size}\n' `aptitude --display-format '%p' search '?installed!?automatic'` | sort -k 2 -n | grep -v deinstall | awk '{printf "%.3f MB \t %s\n", $2/(1024), $1}'
2013-07-26 23:18:20
User: EvilDennisR
Functions: awk grep sort
0

The other commands were good, but they included packages that were installed and then removed.

This command only shows packages that are currently installed, sorts smallest to largest, and formats the sizes to be human readable.

:set number
2013-10-07 15:03:52
User: sonic
Tags: vim vi
0

Prints line numbers making it easier to see long lines that wrap in your terminal and extra line breaks at the end of a file.

:set nu

works too.

find . -name "*.DS_Store" -type f -delete
touch /forcefsk
(cd SRC; find . -type d -exec mkdir TARGET/{} ";"; find . -type f -exec mv {} TARGET/{} ";")
2009-08-17 12:35:48
User: karel1980
Functions: cd find mkdir mv
0

Using a GUI file managers you can merge directories (cut and paste). This command roughly does the same (it doesn't ask for confirmation (no problem for me) and it doesn't clean up the empty SRC directories (no problem, trivial).

probably does the same:

cp -l SRC TARGET; rm -rf SRC
i=60;while [ $i -gt 0 ];do if [ $i -gt 9 ];then printf "\b\b$i";else printf "\b\b $i";fi;sleep 1;i=`expr $i - 1`;done
cat /etc/squid/squid.conf | grep -v '^#' | sed '/^$/d'
git diff | git apply --reverse
feh --bg-scale "`ls -d $HOME/backgrounds/* |sort -R |tail -1`"
2013-03-16 16:05:48
User: bertatum
0

Change your Desktop background/wallpaper with feh lightweight command.

fill background directory with appropriate content.

echo c > /proc/sysrq-trigger
2013-05-07 19:41:40
User: fangfufu
Functions: echo
Tags: kernel
0

Well, this is quite useful for testing if your hardware watchdog is working properly.

convert yourdoublewideimage.jpg -crop 50%x100% +repage output.jpg
2014-01-15 15:34:41
User: pagesix1536
0

Output should be two JPG files named like "output-1.jpg" and "output-2.jpg". The convert command is part of ImageMagick so you'll need that and dependent packages installed to use it.

git commit --allow-empty-message --message ""
2014-07-16 02:06:39
0

This is especially useful for adding changes to a temporary repo, such as a Gist. Avoid using this when collaborating with others.

pm2 start app.js
2014-11-07 23:15:12
User: strzel_a
0

I'm the author of PM2 and wrote this tool, and I'm please to share it here.

Github project link: https://github.com/Unitech/pm2

(acroread &);sleep 2;gdb /opt/Adobe/Reader8/Reader/intellinux/bin/acroread `pidof ld-linux.so.2`
echo 2+3 |bc
2009-07-04 22:03:41
User: Kaio
Functions: echo
0

Handy use of bc in the command line. No need to get 'into' the bc to perform calculations

perl -ne '$pkg=$1 if m/^Package: (.*)/; print "$1\t$pkg\n" if m/^Installed-Size: (.*)/;' < /var/lib/dpkg/status | sort -rn | less
2009-10-19 12:55:59
User: hfs
Functions: perl sort
0

List packages and their disk usage in decreasing order. This uses the "Installed-Size" from the package metadata. It may differ from the actual used space, because e.g. data files (think of databases) or log files may take additional space.

type <command>
find . -name "*.php" -exec grep -i -H "search pharse" {} \;
awk '{if ($1~/Sun|Mon|Tue|Wed|Thu|Fri|Sat/) {DATE=$2" "$3" "$4" "$5 } else {print DATE"|"$0}}' alterorcl.log