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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./hungry若不是替身，他如今已经不在人世了。I. Dangerous Sports Business Activities这一刻萧月婷终于笑了起来。《大艺术家》第二季，以寻找东方之美为主题，探访8位顶级艺术家，包括摄影艺术家荒木经惟、蜷川实花，油画艺术家草间弥生，书法艺术家娄正刚，新媒体艺术家宫岛达男、村松亮太郎，设计师畏研武、菲利普·斯塔克。每集20分钟的片长，带观众追溯他们的人生故事与艺术成就，并引发对于当代艺术文化的思考。Source1.method2 ();