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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.原来郑青木早吩咐又扛了三条船来，遂欢喜不已。尹旭意识到自己有些失态，也好意思打断英布等人的兴致，提前一步离开　　同年，研究生张宁加入，她跟几名伙伴都怀着航天梦，在于杰带领下，成功在嫦娥三号、四号加上了香港团队的名字。, is a monster! This is because medicine is desperate for money, and the market is desperate for money. If combined, wouldn't it become a monster? ! "杜殇不知道，后半夜刘邦和张良商量过后，做出带子婴往鸿门的时候，子婴本人已经被悄无声息地由周勃先行带着离开。