CentOS7 安装 XManager

yum install -y epel-release         # 安装epel源

yum install -y lightdm && yum groupinstall -y xfce        # 安装lightdm和Xfce

修改lightdm.conf文件
`vim /etc/lightdm/lightdm.conf

[XDMCPServer]
enabled=true
port=177

systemctl disable gdm && systemctl enable lightdm     # 将Display Manager切换为lightdm

systemctl start lightdm     # 启动lightdm

sudo systemctl stop firewalld      # 关闭防火墙

参考博客：
使用X Manager远程CentOS 7服务器（XDMCP）：https://blog.csdn.net/lyfqyr/article/details/89041929