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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:

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Your feedback is appreciated via the form on the beta page. Thanks! -Jon & CLFU Team

Commands by donnoman from sorted by
Terminal - Commands by donnoman - 8 results
while true ; do echo -n "`date`";curl localhost:3000/site/sha;echo -e;sleep 1; done
2011-10-14 21:00:41
User: donnoman
Functions: echo sleep true
1

In this case it runs the command 'curl localhost:3000/site/sha' waiting the amount of time in sleep, ie: 1 second between runs, appending each run to the console.

This works well for any command where the output is less than your line width

This is unlike watch, because watch always clears the display.

watch "cat `ls -rcA1 | tail -n1`"
2011-03-25 01:22:05
User: donnoman
Functions: watch
1

Great for watching things like Maildir's or any other queue directory.

sed -e '/^$/d' -i .bak filewithempty.lines
2011-03-24 00:03:25
User: donnoman
Functions: sed
4

Modify file in place to remove empty lines and create a backup of the original with the extension .bak

> /tmp/psup.log; watch "ps up $(pgrep -d, -x nginx) | grep -v STAT | awk '{print $8}' | grep -c [ZUTD] >> /tmp/psup.log; tail -n 22 /tmp/psup.log"
2011-03-16 17:49:23
User: donnoman
Functions: watch
Tags: nginx
-2

This command counts the number of blocked NGINX processes every 2 seconds and shows the last 22 measurements

You should have at least the number of cpu's in a non-blocked state.

The command up to the first ; truncates the log file.

chmod -R u=rw-x+X,g=r-x+X,o= .
2010-07-16 18:42:00
User: donnoman
Functions: chmod
Tags: bash Ubuntu
-1

forces user to rw, group to r, and other to no access.

files will not be marked executable.

directories will be executable for users and groups only.

git remote prune origin
2010-02-01 18:45:51
User: donnoman
0

If you rebase and delete a lot of remote branches via git, your list of branches will end up showing branches on origin that no longer exist. This command will clear them out.

ps aux | grep [a]pache2 | nl
2009-12-17 18:48:09
User: donnoman
Functions: grep ps
4

Write each FILE to standard output, with line numbers added. With no FILE, or when FILE is -, read standard input.

git add -u
2009-09-16 00:13:14
User: donnoman
Tags: git
52

It deletes all removed files, updates what was modified, and adds new files.