一、新建用户
//登录MYSQL
root@log:~# mysql -uroot -p
Enter password: 密码
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 138
Server version: 5.5.53-0ubuntu0.14.04.1 (Ubuntu)
Copyright (c) 2000, 2016, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
//创建用户
mysql> insert into mysql.user(Host,User,Password) values ("localhost","zhouyuyao",password("Zhouyuyao123"));
mysql> insert into mysql.user(Host,User,Password) values ("%","zhouyuyao",password("Zhouyuyao123"));
//刷新系统权限表
mysql> flush privileges;
这样就创建了一个名为：zhouyuyao 密码为：Zhouyuyao123 的用户。
二、登录测试
mysql>exit;
@>mysql -u zhouyuyao -p
@>输入密码
mysql>登录成功
三、用户授权
//登录MYSQL
@>mysql -u root -p
@>密码
//首先为用户创建一个数据库(test)
mysql>create database test;
//授权zhouyuyao 用户拥有test数据库的所有权限
mysql> grant all privileges on test.* to zhouyuyao@'%' identified by 'Zhouyuyao123';
//刷新系统权限表
mysql> flush privileges;
mysql> 其它操作
四、部分授权
mysql>grant select,update on test.* to zhouyuyao@localhost
identified by ‘cplusplus.me';
//刷新系统权限表
mysql> flush privileges;
五、删除用户
@>mysql -u root -p
@>密码
mysql>DELETE FROM user WHERE User=”zhouyuyao” and Host=”localhost”;
mysql> flush privileges;
六、删除数据库
mysql>drop database test;
七、修改密码
@>mysql -u root -p
@>密码
mysql>update mysql.user set password=password(‘新密码’) where
User=”zhouyuyao” and Host=”localhost”;
mysql> flush privileges;
本文转自 归来仍少年 51CTO博客，原文链接:http://blog.51cto.com/shaoniana/1969089
