root@VPN:~/openvpn-ca/keys# journalctl -xn
-- Logs begin at Thu 2017-08-10 21:08:23 CEST, end at Thu 2017-08-10 21:35:17 CEST. --
Aug 10 21:34:42 VPN kernel: ip6_tables: (C) 2000-2006 Netfilter Core Team
Aug 10 21:35:17 VPN systemd[1]: Starting system-openvpn.slice.
-- Subject: Unit system-openvpn.slice has begun with start-up
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit system-openvpn.slice has begun starting up.
Aug 10 21:35:17 VPN systemd[1]: Created slice system-openvpn.slice.
-- Subject: Unit system-openvpn.slice has finished start-up
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit system-openvpn.slice has finished starting up.
--
-- The start-up result is done.
Aug 10 21:35:17 VPN systemd[1]: Starting OpenVPN connection to server...
-- Subject: Unit openvpn@server.service has begun with start-up
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit openvpn@server.service has begun starting up.
Aug 10 21:35:17 VPN ovpn-server[5825]: Options error: --dh fails with 'dh1024.pem': No such file or directory
Aug 10 21:35:17 VPN ovpn-server[5825]: Options error: Please correct these errors.
Aug 10 21:35:17 VPN ovpn-server[5825]: Use --help for more information.
Aug 10 21:35:17 VPN systemd[1]: openvpn@server.service: control process exited, code=exited status=1
Aug 10 21:35:17 VPN systemd[1]: Failed to start OpenVPN connection to server.
-- Subject: Unit openvpn@server.service has failed
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit openvpn@server.service has failed.
--
-- The result is failed.
Aug 10 21:35:17 VPN systemd[1]: Unit openvpn@server.service entered failed state.