linux: network usage with iftop

been experiencing network slowdown in our LAN these past months and have been guessing what's eating the bandwidth. found a tool named iftop a couple of weeks ago that displays network bandwidth usage. you can get it from: http://pkgs.repoforge.org/iftop/

to launch, run: # iftop
press h to toggle help

here's a sample of what it can show:

now network hugging users can be identified ;)