https://www.freedesktop.org/software/systemd/man/latest/systemd.unit.html# https://www.freedesktop.org/software/systemd/man/latest/syst... `/etc/systemd/system

https://www.freedesktop.org/software/systemd/man/latest/systemd.unit.html# https://www.freedesktop.org/software/systemd/man/latest/syst... `/etc/systemd/system/service.d/${...}.conf` I think this is what you're looking for.