If no `tun` device exists, we should advise the user that they may need to create one... https://serverfault.com/questions/429461/no-tun-device-in-lxc-guest-for-openvpn
If no
tundevice exists, we should advise the user that they may need to create one...https://serverfault.com/questions/429461/no-tun-device-in-lxc-guest-for-openvpn