1. 下载mysql的repo源

如果没有 wget 先yum install -y wget

$ wget http://repo.mysql.com/mysql-community-release-el7-5.noarch.rpm

2. 安装mysql-community-release-el7-5.noarch.rpm包

非 root 用户 加上 sudo

$ rpm -ivh mysql-community-release-el7-5.noarch.rpm

3. 安装mysql

$ yum install -y mysql-server

4. 启动mysql

$ service mysqld start

5. 进入mysql and 修改 mysql 密码

$ mysql
$ UPDATE mysql.user SET password=PASSWORD("your password") WHERE user="root" AND Host="localhost";