Monitor Internet Usage on Ubuntu [duplicate]

Question

Possible Duplicate:
How can you monitor internet download usage?

Any idea how one would monitor internet usage on a laptop to find out if any unauthorised program is making internet connections?

Answer 1

Use nethogs :)
Install it by typing sudo apt-get install nethogs.
To start the app type:
sudo nethogs [network interface name e.g. eth0, eth1 or ppp0 etc.]
To find this name use the command ifconfig and check which of the interfaces are associated with valid ip address..