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.

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



Lists all usernames in alphabetical order

Terminal - Lists all usernames in alphabetical order
cut -d: -f1 /etc/passwd | sort
2011-12-20 10:46:52
User: dan
Functions: cut
Lists all usernames in alphabetical order


There is 1 alternative - vote for the best!

Terminal - Alternatives
awk -F ':' '{print $1 | "sort";}' /etc/passwd
2011-12-20 12:46:52
User: atoponce
Functions: awk
Tags: sort awk users

Save some CPU, and some PIDs. :)

getent passwd | cut -d: -f1 | sort
cut -d: -f1 /etc/passwd | sort

Know a better way?

If you can do better, submit your command here.

What others think

cat overload! cut overload!

$ sort -t : -k 1,1 /etc/passwd

Comment by mpb 231 weeks and 2 days ago

Nice, but this shows all fields, not just the usernames.

Comment by dan 231 weeks and 2 days ago


cut -d: -f1 /etc/passwd | sort
Comment by flatcap 231 weeks and 2 days ago

Thanks @flatcap, I've modified the command.

Comment by dan 231 weeks ago

@ flatcap:

sort -t : -k 1,1 /etc/passwd | awk -F: '{print $1}'
Comment by mpb 230 weeks and 5 days ago

Your point of view

You must be signed in to comment.