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



what?s running on a given port on your machine?

Terminal - what?s running on a given port on your machine?
lsof -i -n -P | grep :80
2009-07-17 15:56:19
User: reeyuk
Functions: grep
what?s running on a given port on your machine?


There are 5 alternatives - vote for the best!

Terminal - Alternatives

Know a better way?

If you can do better, submit your command here.

What others think

Why use grep?

lsof -i:80 -n -P

Comment by din7 456 weeks and 6 days ago

Just a small hint for FreeBSD users: The sockstat command (part of the FreeBSD base system) comes very handy for things like this. It displays the network sockets in a clear and concise format.

sockstat -4p 80

Of course you can also use the lsof command (it must be installed from the ports collection), but personally I like sockstat better for things like this. I also keep forgetting the weird options syntax of lsof, but maybe that's just me ...

Comment by inof 456 weeks and 2 days ago

Your point of view

You must be signed in to comment.