#### 安装 安装mysql之前需要先移除mariadb数据库 : ~~~ yum remove mariadb-libs.x86_64 ~~~ 下载MySQL源 https://dev.mysql.com/downloads/repo/yum/  复制此处下载连接  进行下载  安装源 : ~~~ yum localinstall mysql-community-release-el7-8.noarch.rpm ~~~ 安装MySQL ~~~ yum install mysql-community-server ~~~ 默认密码 ~~~ cat /var/log/mysqld.log | grep 'pasword' ~~~ #### 启动 ~~~ service mysqld start ~~~ #### 停止 ~~~ service mysqld stop ~~~