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.

UpGuard checks and validates configurations for every major OS, network device, and cloud provider.

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



Repeatedly send a string to stdout-- useful for going through "yes I agree" screens

Terminal - Repeatedly send a string to stdout-- useful for going through "yes I agree" screens
yes "text" | annoying_installer_program # "text" defaults to the letter y
2009-03-10 05:35:19
User: MaxToTheMax
Functions: yes
Repeatedly send a string to stdout-- useful for going through "yes I agree" screens


There are 2 alternatives - vote for the best!

Terminal - Alternatives

Know a better way?

If you can do better, submit your command here.

What others think

thats what I did previously to get rid of one old ksh script.

Comment by mohan43u 471 weeks and 2 days ago

Very useful and very dangerous!

Comment by haivu 471 weeks and 2 days ago

When I was a Linux instructor, I would run this on systems to wipe the hard drive at the end of the week (don't run this, unless you want to hose your data):

yes "Aaron was here on $(date +D). " | sudo dd of=/dev/sda bs-4096

Then, when the next instructor came to the training center and installed his system, if he wanted, he could look at the bits afterwards, and see my digital graffiti:

sudo xxd /dev/sda | head

Fun times!

Comment by atoponce 471 weeks ago

bs=4096, that is. 'twould be nice if you could edit your comment.

Comment by atoponce 471 weeks ago

Your point of view

You must be signed in to comment.