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I recently got a 3G dongle with a data plan of 200MB per month and I would like to know when I reach that limit. Are there any programs (preferably an indicator) which let my monitor my monthly usage?

Mobile Partner 23 has this functionality but is not available for Linux.

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up vote 2 down vote accepted

There is Datafox, an addon for Firefox to monitor traffic on firefox.

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Thanks for your answer, although NTM is ugly, it does exactly what I asked for. Datafox, is only for 2 Indian providers so it is not that useful for me ;) – Gerhard Burger Aug 3 '13 at 17:26

There is a package for this called modem-manager-gui:

modem-manager-gui screenshot

Canoical's repositories currently contain recent versions for Ubuntu Trusty and newer. For Precise (and earlier) use this PPA:

sudo add-apt-repository ppa:linuxonly/modem+manager+gui 
sudo apt-get update 
sudo apt-get install modem-manager-gui

See the official site.

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Thank you for your answer, in Raring this package is not available, so I installed it via PPA. The program does implement data limits but only for one session. So you cannot monitor your total data usage for a month (maybe in a later version you can). – Gerhard Burger Aug 3 '13 at 17:10

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