方法一 root用户登陆vnc所在机器，终端输入 systemctl restart vncserver@:7.service，其中:7表示vnc桌面号

方法二 1、找一台机器A登陆vnc所在的机器B 2、在终端输入 vncserver -list，会显示

我这里是:7无法打开，这时用kill -9 1805，杀掉这个进程 3、然后终端输入vncserver :7，会有提示已经有:7在运行:

Warning: 101.localdomain:7 is taken because of /tmp/.X11-unix/X7 Remove this file if there is no X server 101.localdomain:7 A VNC server is already running as :7

New ‘101.localdomain:1 (ymq)’ desktop is 101.localdomain:1

Starting applications specified in /home/ymq/.vnc/xstartup Log file is /home/ymq/.vnc/101.localdomain:1.log

4、终端输入su，root用户登陆 删除文件 rm /tmp/.X11-unix/X7 5、重启vnc,systemctl start vncserver@:7.service 6、查看vnc状态，systemctl status vncserver@:7.service