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;