Systemd and openvpn on Ubuntu 18.04
The below link is for 16.04 but seems to work for 18.04 too. My takeaways:
- There is an /etc/default directory where you can edit the openvpn service to start the desired connection by default (tested)
- There is an edit command for the systemd's systemctl (untested)
Read more: Link - Correct way of systemd for OpenVPN client on 16.04 Server? - Ask Ubuntu