The preferred way to run on-shot commands after boot when using Archlinux + initscripts,
is placing them in the
rc.local file. Also, initscripts provide a handy helper which creates a
service file that runs these commands on boot when using systemd. If you want to completely
move away from initscripts, to a pure systemd-based system, you need to create service
file(s) for these commands.
The following is an example service file that adjust the HDD spindown levels.
The most notable options here are the
oneshot service type and the
oneshot service type is used to indicate that the command should exit before starting any
follow-up units. We also set the
RemainAfterExit option to
true to indicate that this service
should be considered active after it exits. Finally, keep in mind that you need the full command