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.

Universal configuration monitoring and system of record for IT.
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

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!
Hide

Top Tags

Hide

Functions

Hide

Credits

Commands by Testuser_01 from sorted by
Terminal - Commands by Testuser_01 - 8 results
strings -1 <file>
2012-11-23 11:33:25
User: Testuser_01
Functions: strings
-1

Use this like the cat command with the additional feature to strip out unprintable characters from the input, newlines will stay.

if [ -n "$SSH_CONNECTION" ]; then export TMOUT=300; fi
2012-11-03 18:39:25
User: Testuser_01
Functions: export
0

This will check if a user is logged in using ssh and will log out the user automatically after the specified time in seconds without data retrieval on the server side.

Will work with bash and zsh so put it into your sourced shell file on the server side.

Be aware that users can change this themselves as it's just a envoronment variable.

export MYSQL_PS1="mysql://\u@\h:/\d - \R:\m:\s > "
2012-11-03 18:22:16
User: Testuser_01
Functions: export
0

You can put this into your shell sourced file like .bashrc or .zshrc to have a different mysql prompt.

See http://dev.mysql.com/doc/refman/5.1/de/mysql-commands.html for more informations.

Beware that currently with mysql 5.5 the seconds are buggy and won't be displayed if you put this into a .cnf file. With the enironment variable this will work.

tidy -i -xml <inputfile>
2012-11-03 18:10:58
User: Testuser_01
8

This will indent the input to be more readable. Warnings and messages are not send to STDOUT so you can just use a pipe to create the formatted outputfile, like:

tidy -i -xml in.xml > out.xml
CTRL+s
2012-03-04 21:30:48
User: Testuser_01
1

This will send the ASCII sequence for DC3 to the currently running tty which results in SIGSTOP (19).

You can continue with ASCII sequence for DC1 by pressing CTRL+q which results in SIGCONT (18).

curl 'https://www.kernel.org/kdist/finger_banner'
2012-03-04 21:10:19
User: Testuser_01
0

Gets the (previously obtainable with:

finger @kernel.org

) info of the latest linux kernel versions available.

awk 'FNR==100 {print;exit}' file
2012-03-04 20:25:57
User: Testuser_01
Functions: awk
Tags: awk time LINES
0

This will save parsing time for operations on very big files.

alias sudo='sudo '
2012-03-04 20:02:38
User: Testuser_01
Functions: alias
Tags: sudo alias shell
0

If you want to carry on your aliases while using sudo, put this into a file which will be parsed when logging in.