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Since both Redis servers are installed on the Linux operating system, and the two Redis servers will switch when the Master master server fails, it must be ensured that the port numbers of the two Redis servers have been added to the firewall, or the firewalls of the two Linux operating systems have been shut down, otherwise Master-link-Status: down will be prompted, and Master master server is not connected. There are two solutions: the first is to shut down the firewalls of the two Linux operating systems; The second method is to add the port number of each Redis service to the firewall to allow communication through the port number. You can use the command "firewall-cmd-query-port=6379/tcp" first. If the result is No, you can continue to execute the following command "firewall-cmd-add-port=6379/tcp". After the command is executed, you will return Success, indicating that the increase was successful. In this way, Redis servers on the two Linux systems can be switched smoothly to perform sentinel mode operations.中年男子米建山与七年前的情人孔琳旧情复燃，当他们又一次面对“离婚”这一敏感话题时，孔琳突然神秘死亡，与孔琳惊人相似的孪生姐姐孔莲突然回国，与案情有关的人接连遇害，疑犯越来越多，究竟谁，不在犯罪现场……For example, if we want to implement a JS function, Such as form validation, Then if we don't use the policy pattern in javascript described in the previous chapter to solve the form validation encapsulation code, It is a temporary form validation function written by itself. Certainly without any encapsulation, Then at this time, we will pop up a prompt to the user for whether the two values are equal. If there is a form verification on another page, their judgment method and business logic are basically the same, but the comparison parameters are different. Should we consider writing a form verification code again? So now we can consider using the template method pattern to solve this problem. Common methods are extracted, and different methods are implemented by specific subclasses. This design code also has the advantages of stronger scalability and better code ~怎么可能？尹旭又不是神仙，他怎么可能预料到将来发生的事情？未卜先知？或许尹旭是存了心思让自己来牵制项羽，但是尹旭的控制力似乎差了些，现在的局面该不在他的预料之中吧？至少韩信？刘邦心里暗自叹息一声，希望真是如此吧。(2) If the book club finds that the content of the death assignment in this novel conflicts with the law or contains unhealthy and vulgar content, and needs your help to maintain the harmonious development of network civilization, please report it to the website immediately.群英荟萃，商界风云《创世纪》后又一部家族恩怨剧重拳出击。身处商战旋涡，为名、为利、为情，爱恨两重天！股票市场中战无不胜的富商利兆天（陶大宇），本是其父在广州所娶的发妻明星（叶德娴）之子，后来其父娶了香港富家之女白宴（鲍起静），天自小在宴悉心栽培下，成为有学问有权势的富家子弟。明其后来港追寻丈夫的消息，并为了重整旗鼓留香港赚钱，惟托人在广州照顾天的亲弟杰（谭耀文）。杰为人攻于心计，志在飞黄腾达，因一次机缘巧合下杰救了天，并在天协助之下来到香港，及后杰恋上天的女友路云（周海媚），一个勾心斗角、兄弟情仇的故事亦同时展开。"Drill the ground?! You mean go underground and avoid attack?" I was very surprised to hear this, so I asked back.