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.

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



Check wireless link quality with dialog box

Terminal - Check wireless link quality with dialog box
while [ i != 0 ]; do sleep 1 | dialog --clear --gauge "Quality: " 0 0 $(cat /proc/net/wireless | grep $WIRELESSINTERFACE | awk '{print $3}' | tr -d "."); done
2009-05-31 16:09:23
User: ncaio
Functions: awk cat grep sleep tr
Check wireless link quality with dialog box

The variable WIRELESSINTERFACE indicates your wireless interface


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

Error: Expected a number for token 4 of --gauge.

Use --help to list options.

Comment by monkey123456 364 weeks and 2 days ago


you really have the file /proc/net/wireless?


test -e /proc/net/wireless || echo "not found"

Comment by ncaio 364 weeks and 1 day ago

Yes I do, I ran your command, returned nothing.


cat /proc/net/wireless shows the data.

(running archlinux, i686)

Comment by monkey123456 364 weeks and 1 day ago

please, copy and paste to me your /proc/net/wireless .

I test the command on slackware.

Comment by ncaio 364 weeks and 1 day ago

Here it is:

Inter-| sta-| Quality | Discarded packets | Missed | WE

face | tus | link level noise | nwid crypt frag retry misc | beacon | 22

wlan0: 0000 100. -44 -91. 0 0 0 0 0 0

Comment by monkey123456 364 weeks ago

trained monkeys are working...

Comment by ncaio 364 weeks ago

generic way was to use the variable WIRELESSINTERFACE.

Comment by ncaio 364 weeks ago

I can confirm it's now working correctly. Thank you.

Comment by monkey123456 364 weeks ago

P? cara! Massa! Aonde eu ando as gatas se ligam...

Comment by faustofilho 277 weeks ago

Your point of view

You must be signed in to comment.