Slurm: Yet Another Network Load Monitor

Unfortunate name, as SLURM (Simple Linux Utility for Resource Management) is already an established and popular open-source product.

http://slurm.schedmd.com/

http://en.wikipedia.org/wiki/Simple_Linux_Utility_for_Resour...

It's a nice tool and you can install it with just apt-get install slurm on Debian. The graph part is not too informative though.

It's highly addictive