centos7 安装 mysql 、修改默认端口号并开放端口

下载mysql源安装包 wget http://dev.mysql.com/get/mysql57-community-release-el7-8.noarch.rpm 安装mysql源  yum localinstall mysql57-community-release-el7-8.noarch.rpm 检查mysql源是否安装成功 yum repolist enabled | grep "m

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