Ok. So I fixed the probem. It would not run with the tutorial that i linked because it used an outdated version of the Godot Linux Server. Replacing it with the up to date version lets me run the Server program ... but I still can`t connect.
On my local machine I can host / connect but I can not connect to a server on my linux vserver. Connecting a python client to a python server on my linux vserver did work though