http://www.cnblogs.com/kevingrace/p/5821450.html
如果报错：job for vncserver@:1.service failed because..........see "systemctl status vnc................" and "journalctl -xe" for details.
改：把vncserver@:1.service中的Type参数设置为simple 再执行 systemctl daemon-reload 再执行 systemctl start vncserver@:1.service
