[Mashiro]

Yes. i also need this kind of tool. it's necessary for those VPS's those havn't control panel or visualizers. custom CP's are not work exactly in bandwidth meter.

You can or better should use vnstat in this case. If needed it even has several frontends like a PHP frontend that will have graphs and everything of the usage in different time periods like daily, weekly, monthly and etc.

https://www.howtoforge.com/tutorial/vnst...ng-ubuntu/ (pretty much applying to any Ubuntu/Debian based distribution and can be easily converted for other OSs as the only part that would be different is the package installation part)