防火墙重启：出错please try to use systemctl.

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查看防火墙状态：

[root@centos6 ~]# service iptables status

iptables：未运行防火墙。

重启防火墙（iptables)命令
#service iptable restart失效

[code]#service iptable restart
Redirecting to /bin/systemctl restart  iptable.service
Failed to issue method call: Unit iptable.service failed to load: No such file or directory.

据说从某个版本的Linux系统（CenterOS/RedHat）后就将service命令改了，如下

[code]#systemctl restart iptables.service
#iptables -L

重启防火墙成功~~~

[code]# service iptables save
The service command supports only basic LSB actions (start, stop, restart, try-restart, reload, force-reload, status). For other actions, please try to use systemctl.

#关闭防火墙
systemctl stop firewalld
#注销防火墙服务
systemctl mask firewalld

#然后安装iptables-services
yum install iptables-services

#设置开机启动防火墙
systemctl enable iptables

#可以使用下面命令管理iptables
systemctl [stop|start|restart] iptables

#保存规则
service iptables save
or
/usr/libexec/iptables/iptables.init save

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