I could use some help. I'm a pretty noobish linux user and have a linux server (running headless ubuntu). I use it for basic provisions of computer services, and to learn.
For the most part I've been able to stumble through the tasks I want to take on. One of the programs my server runs is Teamspeak, and it is always running. When i reboot the server, it's the first thing I fire back up. I've been aware of systemd for some time now and this has been a prime candidate, but I've been putting off setting up any services. I figured the time has come. Holy crap, what a vortex systemd has proven to be.
When I built my server I read that it's good practice to run the software that users will be connecting to through a non-admin account, so I did that. I have a non-admin account that I tmux my various server software on manually.
Reading some systemd tutorials, I've built a service file and I'm trying to register it on my non-admin account, but I get an error when I try to run systemctl --user daemon-reload: "Failed to connect to bus: No medium found". I do not get this error when I run it on the admin account.
All the documentation I can find has got my head spinning. I'm pretty sure you need a doctorate in comp sci to understand the various man pages and webpages.
I mean hi there: https://www.freedesktop.org/software/systemd/man/latest/systemd.service.html#Options
Like holy fsck: https://www.freedesktop.org/software/systemd/man/latest/systemd.unit.html
I think the real question that I'm looking for is if I should be configuring services to run through my admin account, configuring services with my admin account to run as a specific user, or configuring services through my specific user account?
Also, something like Teamspeak, which just needs to run when the server is up and running, does it need before and after definitions, or if I omit them will that work fine?
Any tips, tricks or tutorials are appreciated!
I think that error is related to a missing dbus session but don't quote me on that.
You will probably find it easier to use a system level service, but run it as your unprivileged user with User= and Group= directives. Once you get that working, there are various other parameters you can add to harden the service if you like.
This is a good reference for hardening: https://docs.arbitrary.ch/security/systemd.html
The arch wiki has a good general reference for all things systemd: https://wiki.archlinux.org/title/Systemd
I recommend that route as well.
Since you don’t know much, stick to native services. In most cases those are already preconfigured if native service package is available.