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Centos7, The service is no longer started using init-style scripts, Instead, the unit file is used, Therefore, commands like service iptables start can no longer be used in centos7, Therefore, service iptables save cannot be executed. At the same time, firewall is used to replace the original iptables service in centos7, but don't worry, we just need to install iptables and iptables-services through yum source (iptables are usually installed by default, but iptables-services are not installed by default in centos7). After installing iptables-services in centos7, the rules can be saved by the service iptables save command, as in centos6, and the rules are also saved in the/etc/sysconfig/iptables file.大明兵精粮足，虎将强兵，因家事而苦恼的俺答终于低头，闻大明许诺开市集互通贸易，永世结好，俺答终至大同，称臣纳贡。亚马逊宣布续订《苍穹浩瀚》第六季,该季也将为剧集最终季,第六季预计于明年1月20日开拍。Game Name: Subway: Escape5. Find customers through your competitors在唐太宗身边被立为才人的武媚娘在默默无闻地度过了十余年的宫廷生活之后，终于遇到了一个另唐太宗刮目相看的机会。随着太宗的重视，她与太子李治也渐渐熟悉，两人对对方的印象都非常深刻，并且很有好感。那老者捻须点头，含笑道：这就是了。