删除MySQL
yum remove mysql mysql-server mysql-libs mysql-server
将找到的相关目录或文件删除
find / -name mysql查询出的结果，使用yum remove删除
rpm -qa | grep mysql安装MySQL
yum install mysql mysql-server mysql-libs mysql-server启动MySQL
service mysqld start修改密码
mysqladmin -u root password 123456开启远程访问
grant all privileges on *.* to root @"%" identified by '123456' WITH GRANT OPTION
