1. 下载安装包

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

2.安装

 rpm -ivh mysql-community-release-el7-5.noarch.rpm
sudo yum install mysql-server

3.更改用户权限

sudo chown -R openscanner:openscanner /var/lib/mysql

4.重启服务并登录

service mysqld restart
mysql -u root

5.root用户的密

use mysql;
update user set password=password('new password') where user='root';
flush privileges;

6. 进入mysql

mysql -uroot -p