查看开启服务：
[root@localhost conf.d]# systemctl list-unit-files |grep enabled
auditd.service enabled
[email protected] enabled
crond.service enabled
查看要关闭的防火墙服务
[root@localhost conf.d]# systemctl list-unit-files |grep firewalld
firewalld.service disabled
disabled 是关闭，如果开启，请关闭
systemctl disable firewalld防火墙开关机
启动： systemctl start firewalld
关闭： systemctl stop firewalld
查看状态： systemctl status firewalld
开机禁用 ： systemctl disable firewalld
开机启用 ： systemctl enable firewalld