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.

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.

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:



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!

Top Tags



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

Commands by MarxBro from sorted by
Terminal - Commands by MarxBro - 8 results
2013-09-08 23:22:02
User: MarxBro
Tags: vim

If you need to delete lines that may contain space characters (such as tabs or spaces) as well as empty ones, try:


Just an alternative.

read && ffmpeg -y -r 1 -t 3 -f video4linux2 -vframes 1 -s sxga -i /dev/video0 ~/webcam-$(date +%m_%d_%Y_%H_%M).jpeg
2013-01-17 11:37:09
User: MarxBro
Functions: date read

This command takes a 1280x1024 p picture from the webcam.

If prefer it smaller, try changing the -s parameter: qqvga is the tiniest, vga is 640x480, svga is 800x600 and so on.

Get your smile on and press enter! :)

perldoc -l Module::Name 2>/dev/null
2013-01-11 23:28:13
User: MarxBro
Tags: bash perl

Shows the path if the module is installed or exit quietly (to simply avoid the 'No documentation found' msg).

perl -E 'say $_,`tput setb $_`," "x(`tput cols`-length("$_")),`tput sgr0` for 0..(`tput colors`-1)'
2012-11-22 01:55:51
User: MarxBro
Functions: perl
Tags: perl color tput

Using perl and tput, show all the colors with numbers that your actual $TERM can handle.

If want to remove the numbers at beginning of new line, it should be something like this:

perl -E 'say `tput setb $_`," "x `tput cols`, `tput sgr0` for 0 .. (`tput colors` - 1)'
perl -E 'say$_%15?$_%3?$_%5?$_:Buzz:Fizz:Fizzbuzz for 1..100'
2012-11-18 05:47:29
User: MarxBro
Functions: perl
Tags: perl fizzbuzz

Just another FizzBuzz in Perl.

perl -e 'print map { $_ .= "$ENV{$_}\n" } (keys %ENV)'
2012-10-13 23:38:28
User: MarxBro
Functions: perl

Print environment (system) information using Perl.

perl -e '$|++; while (1) { print " " x (rand(35) + 1), int(rand(2)) }'
perl -le 'print ~~ map {-s} <*>'
2012-02-21 21:09:48
User: MarxBro
Functions: perl
Tags: perl find wc

Just want to post a Perl alternative.

Does not count hidden files ('.' ones).