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.

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.

UpGuard checks and validates configurations for every major OS, network device, and cloud provider.

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



repeat a command every x seconds

Terminal - repeat a command every x seconds
while x=0; do foo ; sleep 1 ; done
2012-07-11 13:22:21
User: eastwind
Functions: sleep
repeat a command every x seconds

repeat a command every X seconds , output show the creation of partition image using fsarchiver, each line show the size of the image.


There is 1 alternative - vote for the best!

Terminal - Alternatives
watch -n 1 "do foo"
2012-07-11 13:42:26
User: mesuutt
Functions: watch

Short method of "while x=0; do foo ; sleep 1 ; done"

while sleep 1; do foo; done
2012-09-14 20:21:04
User: lowbatteries
Functions: sleep

For use when you can't use "watch" (user-defined functions, aliases). This isn't mine - its an alternate posted in the comments by flatcap, and is the shortest and easiest to remember.

Know a better way?

If you can do better, submit your command here.

What others think

You can shorten that in two ways.

Either use the : operator which evaluates to true:

(this is a simple way to create in infinite loop)

while :; do foo; sleep 1; done

or use the sleep as the while condition

while sleep 1; do foo; done
Comment by flatcap 301 weeks and 4 days ago

http://imb-cologne.com/" title="خريد کريو ">خريد کريو

http://imb-cologne.com/" title="خريد کريو پرسرعت">خريد کريو پرسرعت

http://imb-cologne.com/" title="خريد وي پي ان ">خريد وي پي ان

http://imb-cologne.com/" title="خريد فيلترشکن ">خريد فيلترشکن

http://imb-cologne.com/" title="خريد vpn ">خريد vpn

http://telemember.win/" title="خريد ممبر تلگرام ">خريد ممبر تلگرام

http://telemember.win/" title="فروش ممبر تلگرام ">فروش ممبر تلگرام

http://telemember.win/" title="افزايش ممبر تلگرام ">افزايش ممبر تلگرام

http://hotpapers.ir/" title="دانلود مقاله isi">دانلود مقاله isi

http://khatereh.info/google-adwords/" title="تبلیغات در گوگل ">تبلیغات در گوگل

http://khatereh.info/google-adwords/" title="تبلیغات در صفحه اول گوگل ">تبلیغات در صفحه اول گوگل

http://pingstats.ir/" title="سرویس کاهش پینگ">سرویس کاهش پینگ

http://pingstats.ir/" title="خرید سرویس کاهش پینگ">خرید سرویس کاهش پینگ

Comment by clonerman 79 weeks and 3 days ago

Your point of view

You must be signed in to comment.