Generally speaking when creating new custom service, best practice dictates that it is saved in the /etc/systemd/system directory (as opposed to the /lib/systemd/system)
My template for systemd service startup script:
[Unit] Description=My service description After=sshd.service [Service] ExecStart=/full/path/to/command -with "Parameters" [Install] WantedBy=multi-user.target
The script is saved as service_name.service under /etc/systemd/system
Once the service unit file is saved it needs to be enabled:
systemctl enable service_name.service systemctl start service_name systemctl status service_name
and to double check:
journalctl -xn
to see if there are any errors caused by the new service.
To memorise few useful systemd terms I have created a memrise course: