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
Just a simple way without the need of additional tools. Of course, replace eth0 with your IF.
Sample Output
in:   4.1e+03           out:        88

15
By: hons
2011-03-22 10:02:23

2 Alternatives + Submit Alt

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.
depesz · 395 weeks and 6 days ago
This is great, I get the same result with GNOME system monitor. They must do it the same way.
fossilet · 395 weeks and 3 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
bugmenot · 395 weeks and 2 days ago

What do you think?

Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?

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