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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.
March 2, 2015 - New Management
I'm Jon, I'll be maintaining and improving clfu. Thanks to David for building such a great resource!

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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:

  • » 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

Retry the previous command until it exits successfully

Terminal - Retry the previous command until it exits successfully
until !!; do done
2013-04-29 02:30:28
User: tremby
Retry the previous command until it exits successfully

Repeat the previously used command (!!) until it exits with a success code (0). To put a delay between attempts you could do something like

until !!; do sleep 5; done

to wait 5 seconds after each attempt.


There is 1 alternative - vote for the best!

Terminal - Alternatives
until !!; do :; done
!!; while [ $? -ne 0 ]; do !!; done
2013-04-27 20:47:49
User: MagisterQuis

Executes the previously-run command constantly until it returns 0 (success). Put a

jkhgkjh; until [[ $? -eq 0 ]]; do YOURCOMMAND; done
2014-04-11 08:19:15
User: moiefu

You want bash to keep running the command until it is successful (until the exit code is 0). Give a dummy command, which sets the exit code to 1 then keep running your command until it exits cleanly

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