This info worked from the Simplified guide: https://www.simplified.guide/linux/automatically-run-program-on-startup I wanted to start postgresql at startup, because I always end up starting it anyway. As a main-stream application I found it on the list: sudo systemctl list-unit-files --type=service Then I enabled it. sudo systemctl enable postgresql Done! If it hadn’t been on the list I suppose I would have had to make my own unit file for it, thereby adding it to the list.