--建数据库
create database zxlh default character set utf8;

--建用户，只访问zxlh数据库,%表示不限制任何ip
grant all PRIVILEGES on zxlh.* to 'zxlh'@'%' identified by 'zxlh';

--建用户，访问所有数据库
grant all PRIVILEGES on *.* to 'root'@'%' identified by '123456' WITH GRANT OPTION;

--刷新
flush privileges;

更细致的权限分配可以通过工具比如 navicte

用户信息可以在mysql.user中看到
use mysql
select host,user,passsword from user;


忘记密码：
service mysql55-mysqld stop

mysqld_safe --user=root --skip-grant-tables

mysql -u root

use mysql

update user set password=password("new_pass") where user="root";

flush privileges;