I use a broadband modem to connect to internet on my linux machine. Now, I've used the gnome-system-monitor app that correctly displays the kbps as well as total bytes consumed in each session. Now, is there any easy way in linux for me to log all these consumptions (downloads and uploads)?
The thing is that I use a limited usage plan (n number of GBs each month), hence I want to keep track of my usage. What is the best approach to do this on linux?