啟動 OpenVPN Server 後，檢查是否有正常運作
# systemctl start openvpn
# systemctl status openvpn
● openvpn.service – OpenVPN service
Loaded: loaded (/lib/systemd/system/openvpn.service; enabled; vendor preset:
Active: active (exited) since 五 2016-12-23 21:35:43 CST; 28s ago
使用 netstat 來檢查
# netstat -antp | grep :1194
tcp 0 0 0.0.0.0:1194 0.0.0.0:* LISTEN 3146/openvpn
似乎有正常運作[@more@]解決方式：
# systemctl start openvpn@server.service
# systemctl status openvpn@server.service
● openvpn@server.service – OpenVPN connection to server
Loaded: loaded (/lib/systemd/system/openvpn@.service; disabled; vendor preset
Active: active (running) since 五 2016-12-23 21:33:19 CST; 5s ago
關於這二者的說明，可以參考：
[Linux] systemctl 列出來的 loaded active exited 是什麼意思？ @ 亂打一通的心情日記 :: 痞客邦 PIXNET ::
只不過我以前都是習慣使用前一種方式來執行