[diabetus@zebserve-hydrogen openvpn]$ sudo systemctl start openvpn-client@openvpn
Job for openvpn-client@openvpn.service failed because the control process exited with error code.
See "systemctl status openvpn-client@openvpn.service" and "journalctl -xe" for details.
[diabetus@zebserve-hydrogen openvpn]$ systenctl status openvpn-client@openvpn.service
-bash: systenctl: command not found
[diabetus@zebserve-hydrogen openvpn]$ systemctl status openvpn-client@openvpn.service
● openvpn-client@openvpn.service - OpenVPN tunnel for openvpn
   Loaded: loaded (/usr/lib/systemd/system/openvpn-client@.service; disabled; vendor preset: disabled)
   Active: failed (Result: exit-code) since Mon 2017-03-27 14:36:06 BST; 45s ago
     Docs: man:openvpn(8)
           https://community.openvpn.net/openvpn/wiki/Openvpn24ManPage
           https://community.openvpn.net/openvpn/wiki/HOWTO
  Process: 2794 ExecStart=/usr/sbin/openvpn --suppress-timestamps --nobind --config %i.conf (code=exited, status=1/FAILURE)
 Main PID: 2794 (code=exited, status=1/FAILURE)

Mar 27 14:36:06 zebserve-hydrogen openvpn[2794]: WARNING: file 'auth.txt' is group or others accessible
Mar 27 14:36:06 zebserve-hydrogen openvpn[2794]: OpenVPN 2.4.0 x86_64-unknown-linux-gnu [SSL (OpenSSL)] [LZO] [LZ4] [EPOLL] [PKCS11] [MH/PKTINFO] [AEAD] built
Mar 27 14:36:06 zebserve-hydrogen openvpn[2794]: library versions: OpenSSL 1.0.2k  26 Jan 2017, LZO 2.09
Mar 27 14:36:06 zebserve-hydrogen openvpn[2794]: NOTE: the current --script-security setting may allow this configuration to call user-defined scripts
Mar 27 14:36:06 zebserve-hydrogen openvpn[2794]: Cannot load CA certificate file [[INLINE]] (no entries were read)
Mar 27 14:36:06 zebserve-hydrogen openvpn[2794]: Exiting due to fatal error
Mar 27 14:36:06 zebserve-hydrogen systemd[1]: openvpn-client@openvpn.service: Main process exited, code=exited, status=1/FAILURE
Mar 27 14:36:06 zebserve-hydrogen systemd[1]: Failed to start OpenVPN tunnel for openvpn.
Mar 27 14:36:06 zebserve-hydrogen systemd[1]: openvpn-client@openvpn.service: Unit entered failed state.
Mar 27 14:36:06 zebserve-hydrogen systemd[1]: openvpn-client@openvpn.service: Failed with result 'exit-code'.