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



sequence of numbers in a for loop

Terminal - sequence of numbers in a for loop
for f in `jot - 0 50 5` ; do ping -c 1 -m 50 10.0.2.$f ; done
2009-03-23 23:51:18
User: chinkshady
Functions: ping
sequence of numbers in a for loop

Say you need to ping every 5th IP address on your network .. this will give you a way of doing that.

jot can also do counting ... like

jot 4





download from http://oreilly.com/catalog/upt2/examples/#jot or fins athena-jot in rpm format


There are 5 alternatives - vote for the best!

Terminal - Alternatives

Know a better way?

If you can do better, submit your command here.

What others think

You mean just like seq?

seq 4 seq 2 6 seq 2 5 13
Comment by mem 469 weeks and 2 days ago

and pure SHELL,

BASH v3:

for (( num=5; num<51; num+=5 )); do echo $num; done

or BASH v4:

echo {5..50..5}

Why limit yourself to only numbers :P?

echo {A..Z}

and mix'n match:

echo {A..E}{1..3}
Comment by asmoore82 469 weeks and 2 days ago

Yeah, Came here to ask why would you install (or write) jot when seq and the built-ins both work.... and are pretty standard...

Comment by ozymandias 469 weeks and 2 days ago

This was intended for machines that don't have gnu coreutils installed by default like hpux and solaris

You would need to download and install something anyway in that case

Have only used seq for numbers, but jot also does letters and words

Comment by chinkshady 469 weeks and 1 day ago

FreeBSD also doesn't have seq but jot.

thanks @chinkshady

Comment by lme 469 weeks ago

And of course FreeBSD doesn''t have that messy bash in the base system. ;-)

Comment by lme 469 weeks ago

Your point of view

You must be signed in to comment.