Centos8 图形界面的安装与卸载

#查看默认启动
systemctl get-default

#设置默认图形化界面
 systemctl set-default graphical.target

#设置默认命令界面
 systemctl set-default multi-user.target

#不更改默认选项，切换为图形化界面（前提，已安装）
startx

#重启
reboot

卸载ghome

yum groupremove "GNOME"

安装ghome

yum groupinstall "GNOME"

防火墙相关

#查看状态
systemctl status firewalld.service

#打开防火墙
systemctl start firewalld.service

#关闭防火墙
systemctl stop firewalld.service

#开启防火墙
systemctl enable firewalld.service

#禁用防火墙
systemctl disable firewalld.service