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



Source multiline grep with pcregrep

Terminal - Source multiline grep with pcregrep
pcregrep --color -M -N CRLF "owa_pattern\.\w+\W*\([^\)]*\)" source.sql
2010-11-11 12:53:40
User: hute37
Source multiline grep with pcregrep

grep multiline in Perl regexp syntax with pcregrep


There is 1 alternative - vote for the best!

Terminal - Alternatives

Know a better way?

If you can do better, submit your command here.

What others think

without need to install grep variant pcregrep, you can do multiline search with grep.

grep -Pzo "(?s)^(\s*)\N*main.*?{.*?^\1}" *.c


-P activate perl-regexp for grep (a powerful extension of regular extensions)

-z supress newline at the end of line, subtituting it for null character. That is, grep knows where end of line is, but see input as a big one line.

-o print only matching. Because using -z, all file is like a big line, so if there is a match, all file would be printed, this way it don't.

in regexp:

(?s) activate PCRE_DOTALL, which means that '.' find any character or newline

\N find anything except newline, even with PCRE_DOTALL activated

.*? find '.' in nongreedy mode, that is, stops as soon as possible.

^ find start of line

\1 backreference to first group (\s*) This is a try to find same indentation of method

As you can imagine, this print the main method in a C (*.c) source file.

Comment by unixmonkey24864 256 weeks and 5 days ago

grep version is very cool ;)

i like the trick to match closing brace with backreferences ...

Comment by hute37 256 weeks and 4 days ago

Your point of view

You must be signed in to comment.