国内源

yum -y localinstall http://mirrors.ustc.edu.cn/mysql-repo/mysql57-community-release-el7.rpm

更改用户密码

ALTER USER 'jeffrey'@'localhost' IDENTIFIED BY 'password'; //记得修改自己的账户
flush privileges; //修改成功后刷新权限
quit; //最后退出

https://www.jianshu.com/p/b70a2cb5d4be