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I assume that the System Monitor app tracks the total MiBs received since startup. I would like to track the total MiBs received since an arbitrary point of time after startup.

I often use a Samsung 4G wireless hotspot, and it would be useful to monitor how fast I'm using up my alotted monthly data I'm using during a particular session.

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up vote 1 down vote accepted

Use vnstat, it is available in the repositories. You can set up what network interface you want to monitor and check the amount of traffic you have used so far.

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