How do I find out the network usage ie the total amount of data is transferred in or out of my computer(openSUSE 11.2 and gnome) and keep a track of the total network usage?
what exactly do you want to do?
ifconfig -a eth0
gives you RX and TX after the last restart of the interface.
There is also a system monitor. Well, I use KDE so I don’t know where exactly you find in in Gnome but there is one. There you can get different informations about network traffic like data, lost packages, …
Or do you need a script to monitor the network traffic to analyze it afterwards?