systemctl start firewalld.service#启动firewallsystemctl stop firewalld.service#停止firewallsystemctl disable firewalld.service#禁止firewall开机启动

systemctl start iptables.service#启动systemctl stop iptables.service#停止iptablessystemctl disable iptables.service#禁止iptables开机启动

安装命令：yum -yinstall httpd

配置文件默认路径：/etc/httpd/conf/httpd.conf 

启动服务命令：systemctl start httpd.service

开机自动启动：systemctl enable httpd.service

查看状态：systemctl status httpd.service

查看进程是不是存在：ps -ef | grep httpd

查看端口是不是正在监听：netstat -lntp