1 查询firewalld服务的运行状态

systemctl status firewalld.service
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Active: inactive（dead）表示服务关闭状态

2 启动firewalld服务

systemctl start firewalld.service
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3 停止firewalld服务

systemctl stop firewalld.service
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4 停止firewalld服务

systemctl restart firewalld.service
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5 设置开机自启动

systemctl enable firewalld.service
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设置之后，可用如下命令查询开机自启动是否设置成功

systemctl list-unit-files | grep firewalld
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6 设置取消firewalld开机自启动

systemctl disable firewalld.service
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