wget http://dev.mysql.com/get/mysql-community-release-el7-5.noarch.rpm
rpm -ivh mysql-community-release-el7-5.noarch.rpm
yum install mysql-community-server
service mysqld start
mysql -uroot
mysql> set password for ‘root’@‘localhost’ = password(‘passwd‘);
mysql> exit
原文：http://linuxinfo.blog.51cto.com/412748/1867682