https://www.linode.com/docs/applications/remote-desktop/install-vnc-on-ubuntu-16-04/#connect-to-vnc-from-your-desktop
https://blog.whe.me/post/ubuntu-install-gui.html
securecrt ssh 端口转发
关闭vncserver密码认证
vncserver -SecurityTypes None
https://serverfault.com/questions/376302/tigervnc-ssh-without-a-vnc-password
