[SOLVED] Bandwidth counter/monitor?

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http://ubuntuforums.org – Is it possible to retrieve the "Total received" or "Total sent" numbers from the gnome-system-monitor from command line? Or are there other tools/packages that can record and output the total data usage? The motivation is that I want to monitor my bandwidth usage every hour or so. If I have some command line tool to access this information, I can write a script to save the numbers and collapse the data. Since gnome-system-monitor is already monitoring this, I'd prefer not to use additional daemons just for this purpose. (I saw Network Tools providing the same data. So I (Hardware)