debian@zbb:~$ systemctl status playio-vpn.service
● playio-vpn.service - playio-vpn
   Loaded: loaded (/lib/systemd/system/playio-vpn.service; enabled; vendor preset: enabled)
   Active: active (running) since Fri 2021-06-11 16:10:59 +07; 20min ago
  Process: 27889 ExecStart=/app/playio-vpnc start --vpn-dir /app/vpnclient (code=exited, status=0/SUCCESS)
 Main PID: 28021 (vpnclient)
    Tasks: 16 (limit: 1028)
   Memory: 12.9M
   CGroup: /system.slice/playio-vpn.service
           ├─28018 /app/vpnclient/vpnclient execsvc
           └─28021 /app/vpnclient/vpnclient execsvc

Jun 11 16:10:46 zbb systemd[1]: Starting playio-vpn...
Jun 11 16:10:53 zbb playio-vpnc[27889]: INFO : Stop VPN Client if applicable...
Jun 11 16:10:53 zbb playio-vpnc[27889]: INFO : Start VPN Client if not yet running...
Jun 11 16:10:56 zbb playio-vpnc[27889]: INFO : Wait a VPN session is established...
Jun 11 16:10:59 zbb systemd[1]: playio-vpn.service: Supervising process 28021 which is not our child. We'll most likely not notice wh
Jun 11 16:10:59 zbb systemd[1]: Started playio-vpn.