As I had a little trouble setting up a CS:S server on Debian Buster with my apprentices, I've written a tool to install one for me. Takes about 3 Minutes (depending on the network connection to download CS:S), and needs root permissions to install, but runs the server with a minimal set of permissions afterwards (since I'm an IT professional and this stuff is important).

Here's the code:

https://github.com/M3tal-Warrior/installers/tree/master/cssource

Hopefully this helps some newbies and more hopefully those who already have one running with the standard permissions (which is a frikkin bad idea).