Is there documentation that somehow describes what should go in any of these?
/etc/sysconfig//etc/default/etc/systemd/system.control- and
/etc/systemd/systemor/etc/systemd/user
Is there documentation that somehow describes what should go in any of these?
/etc/sysconfig//etc/default/etc/systemd/system.control/etc/systemd/system or /etc/systemd/userThat depends on the package that installed the configuration files. With some files, you can display it and see what it contains.
For /etc/default/grub you can see GNU GRUB Manual 2.14 or run info grub2.
Systemd has extensive documentation. See https://systemd.io/
I think this is considered legacy these days, atleast for some config files.
I am seeing some file there are symlinks to other folders in /etc.
you could see what package creates the folders/files, .e.g.
rpm -qf /etc/default/
=> filesystem-3.18-52.fc44.x86_64
on Fedora 44
Thanks!. I was looking at RH/Fedoras docs and couldn´t find anything definitive.