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

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

3.sudo yum install mysql-server

4.service mysqld restart

mysql -u root　

5.use mysql;

  update user set password=password('new password') where user='root';

  flush privileges;

 

引自https://www.cnblogs.com/huangxinyuan650/p/6360464.html