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.

OpenID
or
Sign in Register

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

Hide

Credits

Site by David Winterbottom (user root).

Watch RX/TX rate of an interface in kb/s

Terminal - Watch RX/TX rate of an interface in kb/s
while [ /bin/true ]; do OLD=$NEW; NEW=`cat /proc/net/dev | grep eth0 | tr -s ' ' | cut -d' ' -f "3 11"`; echo $NEW $OLD | awk '{printf("\rin: % 9.2g\t\tout: % 9.2g", ($1-$3)/1024, ($2-$4)/1024)}'; sleep 1; done
2011-03-22 10:02:23
User: hons
Functions: awk cut echo grep sleep tr
15
Up
Down
Watch RX/TX rate of an interface in kb/s

Just a simple way without the need of additional tools. Of course, replace eth0 with your IF.

Show sample output | Add to favourites | Report as malicious

Alternatives

There is 1 alternative - vote for the best!

Terminal - Alternatives
while cat /proc/net/dev; do sleep 1; done | awk '/eth0/ {o1=n1; o2=n2; n1=$2; n2=$10; printf "in: %9.2f\t\tout: %9.2f\r", (n1-o1)/1024, (n2-o2)/1024}'
2011-03-26 02:52:14
User: quadcore
Functions: awk cat printf sleep
Tags: Network watch rate interface
1
Up
Down
Watch RX/TX rate of an interface in kb/s

A shorter version

Show sample output | Comments (0) | Add to favourites | Report as malicious
while :; do OLD=$NEW; NEW=`cat /proc/net/dev | grep eth0 | tr -s ' ' | cut -d' ' -f "3 11"`; echo $NEW $OLD | awk '{printf("\rin: % 9.2g\t\tout: % 9.2g", ($1-$3)/1024, ($2-$4)/1024)}'; sleep 1; done
2011-03-22 10:23:33
User: DerksIT
Functions: awk cut echo grep sleep tr
Tags: Network watch rate interface
0
Up
Down
Watch RX/TX rate of an interface in kb/s
Comments (0) | Add to favourites | Report as malicious

Know a better way?

If you can do better, submit your command here.

What others think

doesn't work well with longer interface names (like tunnel-xxx). doesn't work well if your byte counter is too long, and there is no space between : (after interface name) and the counter itself.

Comment by depesz 117 weeks and 1 day ago

This is great, I get the same result with GNOME system monitor. They must do it the same way.

Comment by fossilet 116 weeks and 5 days ago

Nice one, but doesn't work with non-linux systems.

On OS X/Darwin, you can use netstat as a byte counter.

Guess it should also work on other BSD systems.

while :; do OLD=$NEW; NEW=$(netstat -I en0 -b | awk 'END { print $7, $10; }'); echo $NEW $OLD | awk '{printf("\rin: % 9.2g\t\tout:

% 9.2g", ($1-$3)/1024, ($2-$4)/1024)}'; sleep 1; done

Comment by bugmenot 116 weeks and 4 days ago

Your point of view

You must be signed in to comment.

Related sites and podcasts