$ sudo systemctl status openvpn
● openvpn.service
Loaded: not-found (Reason: No such file or directory)
Active: inactive (dead)
[dproger@localhost ~]$ sudo systemctl start openvpn
Failed to start openvpn.service: Unit openvpn.service failed to load: No such file or directory.
sudo systemctl start openvpn@server.service
server-udp-20001.conf
, а затем уже systemctl start openvpn@server-udp-20001.service