hello maxbaum,
>>Back In Time is a simple backup tool for Linux.
It provides a command line client 'back in time' and a Qt5 GUI 'backintime-qt' both written in Python3.
>>You only need to specify 3 things:
1. where to save snapshots
2. what folders to backup
3. backup frequency (manual, every hour, every day, every month) so it should be working on VPS.
hope this helps you