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.

Universal configuration monitoring and system of record for IT.
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

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!
Hide

Top Tags

Hide

Functions

Hide

Credits

pretend to be busy in office to enjoy a cup of coffee

Terminal - pretend to be busy in office to enjoy a cup of coffee
cat /dev/urandom | hexdump -C | grep "ca fe"
2010-09-27 08:20:44
User: BOYPT
Functions: cat grep hexdump
34
pretend to be busy in office to enjoy a cup of coffee

just make some data scrolling off the terminal. wow.

Alternatives

There are 2 alternatives - vote for the best!

Terminal - Alternatives
j=0;while true; do let j=$j+1; for i in $(seq 0 20 100); do echo $i;sleep 1; done | dialog --gauge "Install part $j : `sed $(perl -e "print int rand(99999)")"q;d" /usr/share/dict/words`" 6 40;done
2010-10-08 12:12:00
User: houghi
Functions: echo seq sleep
16

This will turn it in an infinite loop and also shows random words from a file, so it won't be the same each time and also not just a number.

for i in `seq 0 100`;do timeout 6 dialog --gauge "Install..." 6 40 "$i";done
2010-09-28 06:38:20
User: javisol
11

The first parameter after timeout is the key parameter; number of seconds to wait. With a 6 you have 600 seconds for your coffee break (10min).

for i in {0..600}; do echo $i; sleep 1; done | dialog --gauge "Install..." 6 40
2010-10-05 02:29:23
User: dennisw
Functions: echo sleep
9

Dialog's gauge widget accepts progress updates on stdin. This version runs dialog once and updates it every second.

There's no need to use timeout which causes screen flicker since it restarts dialog for each update.

while [ true ]; do head -n 100 /dev/urandom; sleep .1; done | hexdump -C | grep "ca fe"
export GREP_COLOR='1;32'; cat /dev/urandom | hexdump -C | grep --color=auto "ca fe"

Know a better way?

If you can do better, submit your command here.

What others think

Sometimes when the data is organized well, you don't need to worry about its real meaning.

Comment by RanyAlbeg 252 weeks and 2 days ago

This will earn you "Geek" title at the office for sure :))))

Comment by etescartz 252 weeks and 2 days ago

This will cause a quite big load. Not that clever when you also use your coffee break to compile your code or something else that needs a lot of CPU cycles.

Comment by yogan 252 weeks and 2 days ago

wow this looks like the matrix screensaver.

Comment by sentinel 252 weeks and 2 days ago

Your point of view

You must be signed in to comment.