Hide

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.


If you have a new feature suggestion or find a bug, please get in touch via http://commandlinefu.uservoice.com/

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.

Hide

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:

Hide

News

2011-03-12 - Confoo 2011 presentation
Slides are available from the commandlinefu presentation at Confoo 2011: http://presentations.codeinthehole.com/confoo2011/
2011-01-04 - Moderation now required for new commands
To try and put and end to the spamming, new commands require moderation before they will appear on the site.
2010-12-27 - Apologies for not banning the trolls sooner
Have been away from the interwebs over Christmas. Will be more vigilant henceforth.
2010-09-24 - OAuth and pagination problems fixed
Apologies for the delay in getting Twitter's OAuth supported. Annoying pagination gremlin also fixed.
Hide

Tags

Hide

Functions

April Fools' Day Prank

Terminal - April Fools' Day Prank
PROMPT_COMMAND='if [ $RANDOM -le 3200 ]; then printf "\0337\033[%d;%dH\033[4%dm \033[m\0338" $((RANDOM%LINES+1)) $((RANDOM%COLUMNS+1)) $((RANDOM%8)); fi'
2010-04-01 06:52:32
User: hotdog003
Functions: printf
24
April Fools' Day Prank

Add this to a fiend's .bashrc.

PROMPT_COMMAND will run just before a prompt is drawn.

RANDOM will be between 0 and 32768; in this case, it'll run about 1/10th of the time.

\033 is the escape character. I'll call it \e for short.

\e7 -- save cursor position.

\e[%d;%dH -- move cursor to absolute position

\e[4%dm \e[m -- draw a random color at that point

\e8 -- restore position.

Alternatives

There are 3 alternatives - vote for the best!

Terminal - Alternatives

Know a better way?

If you can do better, submit your command here.

What others think

Evil, and I like it

Comment by kaedenn 230 weeks and 4 days ago

As written, the test is for less than or equal 32 *thousand* so it runs almost every time. Change it to 3200 for 1/10 of the time.

Comment by dennisw 230 weeks and 3 days ago

Ahhh! Didn't notice that! Thanks, dennisw.

Comment by hotdog003 230 weeks and 3 days ago

Your point of view

You must be signed in to comment.

Related sites and podcasts