Hide

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.
Hide

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:

Hide

News

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!
Hide

Top Tags

Hide

Functions

Hide

Credits

Commands by systemj from sorted by
Terminal - Commands by systemj - 7 results
strace -ff -e write=1,2 -s 1024 -p PID 2>&1 | grep "^ |" | cut -c11-60 | sed -e 's/ //g' | xxd -r -p
2010-04-23 16:22:17
User: systemj
Functions: cut grep sed strace
10

similar to the previous command, but with more friendly output (tested on linux)

ps auxf
2009-02-05 18:07:16
User: systemj
Functions: ps
2

Shows a tree view of parent to child processes in the output of ps (linux). Similar output can be achieved with pstree (also linux) or ptree (Solaris).

tac file.txt
2009-02-05 16:54:45
User: systemj
Functions: tac
8

Or "tail -r" on Solaris.

rpm -qa --last
2009-02-05 16:00:56
User: systemj
Functions: rpm
2

the newest rpms are at the top; individual packages can also be queried this way:

rpm --last -q package

lsof -i -n | grep ESTABLISHED
2009-02-05 15:28:11
User: systemj
Functions: grep
5

Uses lsof to list open network connections (file descriptors), grepping for only those in an established state

echo | openssl s_client -connect www.google.com:443 2>/dev/null |openssl x509 -dates -noout
2009-02-05 15:21:50
User: systemj
Functions: echo
30

remotely connects to an https site, fetches the ssl certificate and displays the valid dates for the cert

diff <(sort file1) <(sort file2)
2009-02-04 22:20:13
User: systemj
Functions: diff sort
82

bash/ksh subshell redirection (as file descriptors) used as input to diff