[DanielDent]

Ugly hack: Use a cron job with "@reboot" as the time.

Better: Start your processes with systemd or another supervisor. You can restart them manually, view their output using journalctl, ...

[_swa8]

This. Running services under screen or tmux is a kludge at best. For unimportant or personal things, fine, but for any serious services, it's not the way to go.