centos 安装mariadb 替代mysql

yum install mariadb-server mariadb
systemctl start mariadb
mysql -uroot -p
默认密码
mysql -uroot -p
mysql_secure_installation  初始化设置  

//允许用户testuser从ip为222.129.1.1的主机连接到mysql服务器，并使用testpassword作为密码
MariaDB [(none)]> grant all privileges on *.* to ‘testuser‘@‘222.129.1.1‘ identified by ‘testpassword‘ with grant option;  
(若是允许所有ip：GRANT ALL PRIVILEGES ON *.* TO ‘testuser’@‘%’ IDENTIFIED BY ‘testpassword’ WITH GRANT OPTION;)
MariaDB [(none)]> flush privileges;   //刷新权限缓存
MariaDB [(none)]> show privileges;
MariaDB [(none)]> show grants for  ‘testuser‘@‘222.129.1.1‘ systemctl restart mariadb