DarkStat is a simple Packet Sniffing Network Bandwidth monitoring Tool forDebian and other Linux distributions. DarkStat gives simple web based output with nice graphs and statistics ,

it will automatically refreshed. Darkstat uses a very low footprint and the memory, CPU usage.

Step 1. Installation:

apt-get install darkstat

Step 2. How to use darkstat:

1. Running darkstat for eth0 :

darkstat -i eth0

NOTE: Now darkstat will start and run in background.

Step 3. View stats:

In your Browser type the address:

http://yourip:667

Now you will see darkstat web interface.

Sumber : http://www.debian-tutorials.com/