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.
[Unit] Description=Fix excessive HDD parking frequency [Service] Type=oneshot ExecStart=/sbin/hdparm -B 220 /dev/sda RemainAfterExit=yes [Install] WantedBy=multi-user.target
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