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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.斯洛博恩岛第一季……来自威星的四个外星人与地球人小迪相识，并在相处中互相帮助，共同努力成长，解救地球危机。以幽默风趣的形式，生动地诠释了地球人类谦逊礼让、团结友爱、互帮互助等优秀品质，塑造了地球青年正直、勇敢、善良、乐于助人的积极向上的形象。At the end of these days, the yard is full of our achievements. Everyone is very happy. Ping Jie's brother suggested to have a bar for dinner. He also went to his cousin's house a few kilometers away to get two cans of rice wine made by himself. We also came to our strength and cooked our own food. Each of us showed his skill in cooking a dish. At the dinner table, a few glasses of wine went down and everyone talked a lot. (In fact, the degree of this wine is not low, ha ha.)Principle of experiment:本片讲述了在捕蛇村长大的小树，因为善良救下一只小蛇，取名“小花”。多年后，小树成为生物科研员，探寻基因的秘密，而别有用心的同事却利用小树，闯入捕蛇村的禁地——食人岛，岛上水汽弥漫，静谧又诡异，似乎有一双眼睛在盯着闯入者的一举一动……