Ahmedabad Ubuntu Free Linux Support

vnStat

vnStat is a commandline-based bandwidth monitoring tool which runs on Linux and BSD platforms. In ubuntu you can install it by:

sudo apt-get install vnstat

Once it is installed, just type vnstat to view traffic logs. vnStat can monitor specific networks only and it creates a separate database for each network interface. You can even view the logs in your browser. This post has detailed instructions about how to do the same.