安装firewalld 防火墙yum install firewalld
开启防火墙服务systemctl start firewalld.service
启动防火墙 systemctl start firewalld
关闭防火墙systemctl stop firewalld.service
开机自动启动systemctl enable firewalld.service
查看状态firewall-cmd --state //running 表示运行
重新加载防火墙：firewall-cmd --reload
开放防火墙8080端口，指令是firewall-cmd --permanent --add-port=8080/tcp