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



Show internet IP Address in prompt --> PS1 var

Terminal - Show internet IP Address in prompt --> PS1 var
export PS1="[\[email protected]`curl icanhazip.com` \W]$ "
2011-11-07 14:48:16
User: peshay
Functions: export
Show internet IP Address in prompt --> PS1 var


There is 1 alternative - vote for the best!

Terminal - Alternatives
export PS1="[\[email protected]`hostname -I` \W]$ "
2011-10-25 18:22:55
User: voyeg3r
Functions: export

when working with many machines in a computer lab need to know the IP addr is very large, this is a simplistic solution to make things easier

Know a better way?

If you can do better, submit your command here.

What others think

Ouch. Why the backticks? $() ftw.

Comment by atoponce 332 weeks and 1 day ago

Who really cares? Its still useful.

Comment by TheShadowFog 332 weeks and 1 day ago

Using the icanhazip.com in your prompt is a really bad idea. It will slow things down a lot and I doubt you change your IP so often that you need it.

I would do this in the following manner.

1) If the network connection starts, write the IP to a file

2) See if the connection is up. If it is, use the IP, if it isn't, show other information (and edit the IP)

3) When the network goes down, edit the file

Comment by houghi 332 weeks and 1 day ago

Hm, interesting.

Comment by TheShadowFog 332 weeks and 1 day ago

Your point of view

You must be signed in to comment.