Hide

What's this?

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.


If you have a new feature suggestion or find a bug, please get in touch via http://commandlinefu.uservoice.com/

Get involved!

You can sign-in using OpenID credentials, or register a traditional username and password.

First-time OpenID users will be automatically assigned a username which can be changed after signing in.

Hide

Stay in the loop…

Follow the Tweets.

Every new command is wrapped in a tweet and posted to Twitter. Following the stream is a great way of staying abreast of the latest commands. For the more discerning, there are Twitter accounts for commands that get a minimum of 3 and 10 votes - that way only the great commands get tweeted.

» http://twitter.com/commandlinefu
» http://twitter.com/commandlinefu3
» http://twitter.com/commandlinefu10

Subscribe to the feeds.

Use your favourite RSS aggregator to stay in touch with the latest commands. There are feeds mirroring the 3 Twitter streams as well as for virtually every other subset (users, tags, functions,…):

Subscribe to the feed for:

Hide

News

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.
Hide

Tags

Hide

Functions

All commands from sorted by
Terminal - All commands - 11,621 results
rename *.JPG *.jpg
2014-03-05 14:54:33
User: gtoal
Functions: rename
Tags: batch rename
-1

# Limited and very hacky wildcard rename

# works for rename *.ext *.other

# and for rename file.* other.*

# but fails for rename file*ext other*other and many more

# Might be good to merge this technique with mmv command...

mv-helper() {

argv="`history 1 | perl -pe 's/^ *[0-9]+ +[^ ]+ //'`"

files="`echo \"$argv\"|sed -e \"s/ .*//\"`"

str="`history 1 | perl -pe 's/^ *[0-9]+ +[^ ]+ //' | tr -d \*`"

set -- $str

for file in $files

do

echo mv $file `echo $file|sed -e "s/$1/$2/"`

mv $file `echo $file|sed -e "s/$1/$2/"`

done

}

alias rename='mv-helper #'

httpd2 -V
tar jcpf /home/[usuario]/etc-$(hostname)-backup-$(date +%Y%m%d-%H%M%S).tar.bz2 /etc
2011-04-29 22:53:11
User: mack
Functions: date tar
-1

Simple Compressed Backup of the /etc

Linux compatible

cat /dev/zero > /dev/sda
2013-09-13 21:47:48
User: fhh
Functions: cat
-1

Exactly the same effect with 3 less characters ;-) (Removes all files/filesystems of a harddisk. It removes EVERYTHING of your hard disk. Be careful when to select a device.)

You can press Ctrl + C after few seconds

(No output)

folder=0;mkdir $folder; while find -maxdepth 1 -type f -exec mv "{}" $folder \; -quit ; do if [ $( ls $folder | wc -l ) -ge 100 ]; then folder=$(( $folder + 1 )); mkdir $folder; fi ; done
2011-02-11 21:28:01
User: Juluan
Functions: find ls mkdir mv wc
-1

If you have a folder with thousand of files and want to have many folder with only 100 file per folder, run this.

It will create 0/,1/ etc and put 100 file inside each one.

But find will return true even if it don't find anything ...

vim -p `ls *.java *.xml *.txt *.bnd 2>/dev/null`
lsof -i
2011-10-03 02:06:30
User: shsingh
-1

This option selects the listing of all Internet and x.25 (HP-UX) network files.

sshostnew () {sed -i "$1d" $HOME/.ssh/known_hosts ; }
2011-11-07 10:33:04
User: _john
Tags: ssh sed
-1

If you work in an environment, where some ssh hosts change regularly this might be handy...

sed -re '/^#/d ; s/#.*$//'
2012-02-01 20:39:23
User: Zulu
Functions: sed
Tags: sed
-1

Delete all comments (#) on text :

It deletes the entire comment line and remove comments form end of others.

echo "DISPLAY=$DISPLAY xmessage convert db to innodb" | at 00:00
cal | sed -E "2,8s/(^|[^0-9])($(date +%e))( |$)/\1$(echo "\033[0;36m\2\033[0m")\3/g"
2011-04-30 03:16:31
User: iridium172
Functions: cal sed
-1

Colors a the current date in cal output

gvim -u NONE -U NONE
curl -o <bibliography> "http://www.citeulike.org/bibtex/user/<user>"
2009-03-26 23:08:14
User: qubyte
-1

I love CiteULike. It makes keeping a bibtex library easy and keeps all my papers in one place. However, it can be a pain when I add new entries and have to go through the procedure for downloading the new version in my browser, so I made this to grab it for me! I actually pipe it directly into a couple of SED one liners to tidy it up a bit too. Extremely useful, especially if you make a custom BibTeX script that does this first. That way you can sort a fresh BibTeX file for each new paper with no faf.

To use just replace with your CiteULike user name. It doesn't download entries that you've hidden but I don't use that feature anyway.

ps -u<user>
for file in `cat urls.txt`; do echo -n "$file " >> log.txt; curl --head $file >> log.txt ; done
2010-10-19 02:54:13
User: Glutnix
Functions: echo file
-1

urls.txt should have a fully qualified url on each line

prefix with

rm log.txt;

to clear the log

change curl command to

curl --head $file | head -1 >> log.txt

to just get the http status

for f in *; do mv "$f" "${f/foo/bar}"; done
2011-04-30 09:53:20
User: uwe
Functions: mv
-1

without sed, but has no problems with files with spaces or other critical characters

/opt/google/chrome/google-chrome --user-data-dir=$HOME/.config/google-chrome/`zenity --entry --text="Enter a profile name:"`
2011-01-06 19:41:45
User: gml
-1

Simple Google Chrome profile manager using zenity for profile name input. Place this in a shell script and then use the path to it as the command field in a gnome/kde shortcut. When you start it you will be prompted for a profile to use, if you leave it blank you should get the default profile.

ls | sed 'p;s/foo/bar/' | xargs -n2 mv
ripit -c 0 --outputdir $1 --nosubmission
for k in `git branch -r|awk '{print $1}'`;do echo -e `git show --pretty=format:"%Cgreen%ci_%C(blue)%c r_%Cred%cn_%Creset" $k|head -n 1`$k;done|sort -r|awk -F"_" '{printf("%s %17s %-22s %s\n",$1,$2,$3,$4)}'
svn status | grep "^\?" | awk '{print $2}' | xargs svn add
2009-03-12 15:06:12
User: unixfu73000
Functions: awk grep xargs
Tags: svn
-1

This adds all new files to SVN recursively. It doesn't work for files that have spaces in their name, but why would you create a file with a space in its name in the first place?

dd if=/dev/hda of=file.img
svn log | grep "$LOGNAME" | grep `date '+%Y-%m-%d'`
expand -t 2 <filename>
2010-07-13 23:04:57
User: camocrazed
Functions: expand
Tags: expand
-1

Change the number to change the number of spaces. Leaving it out defaults to 8. Leaving out the filename defaults to stdin.

And to do it in reverse, you can use the unexpand command.

find_alternatives(){ for i;do which "$i" >/dev/null && { echo "$i"; return 0;};done;return 1;}
2011-01-06 19:53:46
User: eightmillion
Functions: echo return which
-1

This function is used to set environmental variables from a list of alternatives depending on what's installed on the system. It returns the first program found in the list.

Example usage:

export BROWSER=$(find_alternatives chromium-browser google-chrome opera firefox firefox-bin iceweasel konqueror w3m lynx)

.

export EDITOR=$(find_alternatives vim nano pico emacs kate)

.

export PAGER=$(find_alternatives vimpager less most more pg)