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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.




All commands from sorted by
Terminal - All commands - 11,927 results
find /home -uid 1056 -exec chown 2056 {} \;
2009-02-17 19:42:50
Functions: chown find

Finds all files in /home owned by UID 1056 and changes to 2056.

find . -size +10240k -exec ls -l {} \; | awk '{ print $5,"",$9 }'|sort -rn > message.out
2009-02-17 19:39:56
User: rommelsharma
Functions: awk find ls

This command specifies the size in Kilobytes using 'k' in the -size +(N)k option. The plus sign says greater than. -exec [cmd] {} \; invokes ls -l command on each file and awk strips off the values of the 5th (size) and the 9th (filename) column from the ls -l output to display. Sort is done in reversed order (descending) numerically using sort -rn options.

A cron job could be run to execute a script like this and alert the users if a dir has files exceeding certain size, and provide file details as well.

watch ifconfig eth0
sudo find / -user root -perm -4000 -print
2009-02-17 18:10:31
User: tlknv

Use ^D instead of exit.

Also ^D ends input stream when you use terminal for typing into standard input.

mysqldump --add-drop-table --extended-insert --force --log-error=error.log -uUSER -pPASS OLD_DB_NAME | ssh -C user@newhost "mysql -uUSER -pPASS NEW_DB_NAME"
2009-02-17 17:57:53
User: Tscherno
Functions: ssh

Dumps a MySQL database over a compressed SSH tunnel and uses it as input to mysql - i think that is the fastest and best way to migrate a DB to a new server!

vncserver -nohttpd -name hidef-server -depth 24 -geometry 1440x900
2009-02-17 17:50:33
User: starchox
Tags: Network , net

-nohttpd don't run mini-httpd if VNC java applet is found

-name change the name of the desktop, it's passed to xstartup script via $VNCDESKTOP, run different set of apps acording the name.

-depth pixel depth in bits of the desktop, default is 16

-geometry size of the desktop, default is 1024x768

cd `pwd -P`
2009-02-17 17:21:24
User: Davvolun
Functions: cd

If you use symlinks a lot, especially nested symlinks, this puts you back on the absolute path to command-line-fu-nirvana. (Note the backticks around pwd).

history -w <switch to another terminal> history -r
2009-02-17 17:11:31
User: tlknv

Or just do history -w before opening another terminal.

ls -1 . dir2 dir3|sort|uniq -d
2009-02-17 16:29:03
User: tlknv
Functions: ls

cat file1 file2 file3|sort|uniq -d

finds the same lines in several files, especially in files with lists of files.

ssh -CNL 3306:localhost:3306 user@site.com
ssh -D 8888 user@site.com
2009-02-17 15:34:27
User: wesrog
Functions: ssh

Simply change your web browser's proxy settings to point to a SOCKS proxy at port 8888 and you're good to go.

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

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

find apps/ -name "*.svn-base" -prune -o -print -name "*.php" | xargs grep -E 'new .+Form\('
2009-02-17 14:56:01
User: ubermuda
Functions: find grep xargs

finds all forms instanciated into a symfony project, pruning svn files.

mkdir -p work/{d1,d2}/{src,bin,bak}
perl -pe 's/\d+/++$n/e' file.txt
cat /proc/cpuinfo
2009-02-17 14:50:29
User: stinger
Functions: cat

how to get full cpu info of your (linux) box

ls -1 /bin | xargs -l1 whatis 2>/dev/null | grep -v "nothing appropriate"
2009-02-17 14:46:01
User: stinger
Functions: grep ls whatis xargs

Get simple description on each file from /bin dir, in list form, usefull for newbies.

for FILE in $(ls); do [COMMAND]; done
2009-02-17 14:42:46
User: stinger

# Small for loop, that can list files in dir, and after that executes

# [COMMAND] of your choice, usefull for example rename, move, tar etc..

# change cmd's for different results :)

echo $RANDOM
nc -v -l 80 < file.ext
2009-02-17 14:39:52
User: moz667

From the other machine open a web navigator and go to ip from the machine who launch netcat, http://ip-address/

If you have some web server listening at 80 port then you would need stop them or select another port before launch net cat ;-)

* You need netcat tool installed

history | awk '{print $2}' | sort | uniq -c | sort -rn | head
grep -c -e '^cpu[0-9]\+' /proc/stat
egrep -o '\b[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\b' access.log | sort -u
^J tput sgr0 ^J
2009-02-17 09:57:22
User: berta
Functions: tput

when your terminal session seems unrensponsive (this normally happen after outputting some binary data directly on your standard output) it may me saned by hitting:

CTRL+J tput sgr0 CTRL+J

Note: don't press the Enter key, just ctrl+j