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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.


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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.
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Psst. Open beta.

Wow, didn't really expect you to read this far down. The latest iteration of the site is in open beta. It's a gentle open beta-- not in prime-time just yet. It's being hosted over at UpGuard (link) and you are more than welcome to give it a shot. Couple things:

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Use Perl like grep

Terminal - Use Perl like grep
prep () { perl -nle 'print if '"$1"';' $2 }
2011-08-13 14:29:26
User: dbbolton
Functions: perl
2
Use Perl like grep

If you've ever tried "grep -P" you know how terrible it is. Even the man page describes it as "highly experimental". This function will let you 'grep' pipes and files using Perl syntax for regular expressions.

The first argument is the pattern, e.g. '/foo/'. The second argument is a filename (optional).

Alternatives

There are 3 alternatives - vote for the best!

Terminal - Alternatives
ack; pcregrep
2011-08-14 18:01:36
User: depesz
Tags: perl grep regex
2

Much better alternatives - grep-alikes using perl regexps. With more options, and nicer outputs.

Know a better way?

If you can do better, submit your command here.

What others think

grep -P

Just sayin'.

Comment by h3xx 262 weeks ago

@h3xx read my description.

Comment by dbbolton 258 weeks and 5 days ago

Your point of view

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