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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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Universal configuration monitoring and system of record for IT.

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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.
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



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:

  • » The open beta is running a copy of the database that will not carry over to the final version. Don't post anything you don't mind losing.
  • » If you wish to use your user account, you will probably need to reset your password.
Your feedback is appreciated via the form on the beta page. Thanks! -Jon & CLFU Team

Extract raw URLs from a file

Terminal - Extract raw URLs from a file
egrep -ie "<*HREF=(.*?)>" index.html | cut -d "\"" -f 2 | grep ://
2011-03-29 18:20:50
User: fanfani
Functions: cut egrep grep
Extract raw URLs from a file

you can also use cut instead of awk. less powerful but probably faster. ;)


There is 1 alternative - vote for the best!

Terminal - Alternatives
egrep -ie "<*HREF=(.*?)>" index.html | awk -F\" '{print $2}' | grep ://

Know a better way?

If you can do better, submit your command here.

What others think

You can do the whole thing (more successfully even) with versions of grep that support PCRE (like GNU grep).


curl -sAOpera "http://www.google.com/search?q=linux" | grep -Pio '(?<=href=['\''"])[^:]+://[^'\''"]+' curl -sAOpera "http://www.google.com/search?q=linux" | egrep -ie "<*HREF=(.*?)>" | cut -d "\"" -f 2 | grep ://
Comment by eightmillion 291 weeks ago

Fails if the attributes do not use " characters as start/end tokens. Does not pick up any URLs in any attributes other than HREF, nor will it recognize relative URLs and change them to absolute URLs.

Comment by Mozai 249 weeks ago

Your point of view

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