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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.BBC已正式增订《黑暗物质三部曲》第二季，第二季共八集。该剧改编自菲利普·普尔曼同名奇幻三部曲小说，故事围绕小孤女莱拉在平行宇宙中的冒险经历展开。　　白东秀是李朝英祖和正祖时代的武士，曾编撰《武艺图谱通志》，他与正祖大王的护卫队一起，与大王的对立派的暗杀组织『黑色烛笼』的武士一决高下。二更求粉红订阅。The following is the definition of the factory method: an interface is defined to create an object, but the subclass decides which one to create. The factory method defers this process of creating objects to subclasses.40集电视连续剧《大境门》以张家口作为我国对外贸易“陆路商埠”的史实为背景，讲述了民国初年张家口巨商王瑞昌在张库大道(起于张家口，终于库伦，即今乌兰巴托)上的经商奋斗的故事，再现了动荡时局下的这条中国北方唯一的进出口贸易陆路通道的兴衰……该电视剧将于2009年播出，为建国60周年献礼。官方宣布第六季