MySQLはbased on CentOS 7をインストールする.2

rpm -qa | grep mariadb
rpm -e mariadb-libs-5.5.37-1.el7_0.x86_64
// or     MariaDB 
rpm -e --nodeps mariadb-libs-5.5.37-1.el7_0.x86_64
//     
yum install libaio net-tools

//   repo
wget http://repo.mysql.com/mysql-community-release-el7-5.noarch.rpm
//   repo
rpm -ivh mysql-community-release-el7-5.noarch.rpm
//   mysql
yum install mysql-server
//     
service mysqld restart
//       
firewall-cmd --zone=public --add-port=3306/tcp --permanent
firewall-cmd --reload

mysql -u root
mysql > use mysql;
mysql > update user set password=password('123456') where user='root';
mysql > GRANT ALL PRIVILEGES ON *.* TO 'root'@'%'WITH GRANT OPTION;     //               
mysql > exit;