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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.In some first-tier cities, operators have to increase the number of 5G base stations while ensuring the operation of 4G base stations, which will increase the difficulty and financial pressure accordingly.Article 30 Anchoring ships and grounded ships本剧以新人贾一平饰演的大学生刑剑峰为主线人物，奚美娟、董晓燕、王茜、曹雪分别饰演在刑剑峰的生命中起着重要作用的四个女人，一个男人周旋于四个女人之间层叠交错地展开了一幕幕游离于股场幕后惊心动魄的暗箱故事。洞。 　　囤积物资伺机炒卖为庄，为求利益最大化，庄者投机无所不用其极。刑剑峰研究生毕业就职粤兴证券公司，被富刺激和挑战的行业吸引，多种优势和机遇，在“恩师”薛淑玉升为总经理时，一步登天当上“操盘手”，走上新时代金融“豪赌”，快意江湖的中心点。领导、恩师、情人、爱人、朋友、伙伴乃至敌人的位置不停转换；邢在屡遭隐害打击中质变：斗死薛淑玉，放任妻子挪用公款被判死刑，逼走挚友，出卖色相，陷害同仁，打法律擦边球……终成为公司总经理。然后疯狂设计出一个个天衣无缝的骗局赌局，数额之大旷古惊心……刷新三观的泰剧《Club Friday The Series 10》的最后一部剧《不愿接受的人》PS: Many forums have seen beginners ask whether WCF still needs to learn in depth, because they think these technologies may be outdated. Maybe Microsoft will launch a new SOA implementation scheme at that time. Wouldn't it be a waste of time to learn in depth, so they feel that there is no need to learn in depth and just know how to use them. I had the same feeling about this problem before, but now I think that although WCF technology may be replaced, the key to understanding a technology in depth is not to know some more advanced API calls, but to understand its implementation mechanism and way of thinking. Even if the latter technology is replaced, the mechanism behind it is definitely similar. Therefore, if you have a thorough understanding of a technology, you will feel familiar with the new technology and relaxed about it. In addition, after you have a thorough understanding of a technology, you dare to say that you have mastered the technology well during the interview, instead of saying that you use it a lot at ordinary times. Once you ask deeply, you do not know the implementation principle behind it. This is also why I want to write WCF series. I hope this opinion is helpful to some beginners.　　平山有个待嫁的女儿，但他没放心上，直到遇上中学老师。老师晚年和女儿一起生活，彼此都不快乐。平山看在眼里，才开始害怕误了女儿婚期。良缘终于找到了，但女儿嫁的，却不是原来的意中人。婚宴后，平山到了酒馆，这一回，孤独的父亲醉倒了。