Personally I find systemd man pages pretty great, they comprehensively explain pretty much every thing that you need to know. Sure, they are more of a reference

Personally I find systemd man pages pretty great, they comprehensively explain pretty much every thing that you need to know. Sure, they are more of a reference than a tutorial and there is lot of material to read there, but still I'd recommend reading the relevant sections whenever you are working with systemd https://www.freedesktop.org/software/systemd/man/latest/systemd.html https://www.freedesktop.org/software/systemd/man/latest/syst...