rpm -qa | grep mysql删除mysql 账号和用户组
删除/etc/my.cnf
rpm -e mysql-......或者
commen]# rpm -e --nodeps mysql-......
wget https://dev.mysql.com/get/mysql57-community-release-el6-9.noarch.rpm
rpm -Uvh mysql57-community-release-el6-9.noarch.rpm说明：安装成功后在/etc/yum.repos.d/下会多出 mysql-community-source.repo mysql-community.repo
yum install mysql-community-server说明：它会进行下载和安装 过程中需要输入两次Y
service mysqld start
mysql -u root -p原文：https://www.cnblogs.com/cfas/p/9499540.html