MySQL 安装

1. wget https://repo.mysql.com//mysql57-community-release-el6-9.noarch.rpm

2. yum localinstall mysql57-community-release-el6-9.noarch.rpm

3. 安装最新版本（直接运行）：yum localinstall mysql57-community-release-el6-9.noarch.rpm

4. 修改配置文件：/etc/my.cnf

5. 启动服务：service mysqld start

6. 查询默认密码：sudo grep 'temporary password' /var/log/mysqld.log

7. 登录后修改默认密码：ALTER USER 'root'@'localhost' IDENTIFIED BY 'MyNewPass4!';