For anyone who is interested in Linux development, I decided to build this GUI app with `Python gobject` that fetches process-wise bandwidth consumed for each period (such as firefox 10GB, ssh 1GB, etc.) as they show in android. I know nethogs exists for this, but it doesn't save historical data, nor does it have a GUI.<p>So, I went about building this app with the standard way: of reading into `/proc/net/dev` for overall bandwidth and `/proc/<pid>/net/dev` for process-wise bandwidth.<p>It was a nasty little surprise for me when I came to know that `/proc/<pid>/net/dev` actually doesn't give me process wise bandwidth, it does the same as the overall `/proc/net/dev` :-(.<p>As a result, my [project](<a href="https://github.com/prahladyeri/netpatrol" rel="nofollow">https://github.com/prahladyeri/netpatrol</a>) is stuck in limbo until I figure out how `nethogs` gets the process-wise bandwidth by going through its overwhelming source-code. I presently don't have the time to do that, but one day, I'll get it!! If anyone can help me with this, they are most welcome!