Centos7安装图形化界面方法
安装X窗口系统
yum groupinstall "X Window System" -y安装Gnome图形界面软件
yum groupinstall "GNOME Desktop" "Graphical Administration Tools" -y查看默认启动的模式
systemctl get-default开机启动图形界面
systemctl set-default graphical.target开机启动命令行界面
systemctl set-default multi-user.target