====== Services - systemd ======
  * [[https://www.digitalocean.com/community/tutorials/how-to-use-systemctl-to-manage-systemd-services-and-units|How To Use Systemctl to Manage Systemd Services and Units]]
  * [[https://www.golinuxcloud.com/run-script-with-systemd-before-shutdown-linux/|How to run script with systemd right before shutdown in Linux]]