1，創建mysql用及授予權限：

在mysql中輸入help grant 會出現下面信息：

CREATE USER ‘jeffrey‘@‘localhost‘ IDENTIFIED BY ‘mypass‘;
GRANT ALL ON db1.* TO ‘jeffrey‘@‘localhost‘;
GRANT SELECT ON db2.invoice TO ‘jeffrey‘@‘localhost‘;
GRANT USAGE ON *.* TO ‘jeffrey‘@‘localhost‘ WITH MAX_QUERIES_PER_HOUR 90;

通過grant 命令創建用戶並授權：

mysql> grant all privileges on wordpress.* to ‘userdb‘@‘localhost‘ identified by ‘admin‘;
Query OK, 0 rows affected (0.00 sec)

生產環境針對主庫（寫入主讀為輔）用戶的授權；

普通環境：

1. 本機：lnmp，lamp環境數據庫授權
2. grant all privileges ON blog.* to blog@localhost identified by ‘123456’
4. 應用服務器和數據庫服務器不在一個主機上授權；
5. grant all privileges ON blog.* to blog@10.0.0.% identified by ‘123’
7. 嚴格的授權：重視安全，忽略了方便；
8. grant select,insert,update,delete ON blog.* to blog@10.0.0.% identified by ‘123’
10. 生產環境從庫（只讀）用戶的授權；
11. grant select ON blog.* to blog@10.0.0.% identified by ‘123’
13. 查看授權用戶oldboy的具體的授權權限
14. show grants for ‘oldboy’@’localhost’;

第一種：授權用戶

1. grant all on test.* to oldboy@127.0.0.% identified by ‘oldboy123’
2. show grants for oldboy@’127.0.0.%’; 查看授權用戶
3. +-------------------------------------------------------------------------------------------------------------+
4. | Grants for root@127.0.0.1|
5. +-------------------------------------------------------------------------------------------------------------+
6. | GRANT USAGE ON *.* TO ‘root‘@‘127.0.0.1‘ IDENTIFIED BY PASSWORD ‘*6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9‘ |
7. | GRANT ALL PRIVILEGES ON `test`.* TO ‘root‘@‘127.0.0.1‘ |
8. +-------------------------------------------------------------------------------------------------------------+
9. 2 rows in set (0.00 sec)

■ 第二種：授權方法

1. create user bbs@‘172.16.1.1/255.255.255.0‘ identified by ‘123456‘；
2. 先授權可以登錄的
3. mysql> show grants for bbs@‘172.16.1.1/255.255.255.0‘;
4. mysql> grant select on wordpress.* to bbs@‘172.16.1.1/255.255.255.0‘;

授權局域網主機連接遠程數據庫

a.一條命令百分號匹配法

1. grant all on *.* to‘test@10.0.0.%’identified by ‘test123’;

b、一條命令子網掩碼配置法

1. grant all on *.* to test@’10.0.0.0/255.255.255.0’ identified by ‘test123’;

c、兩條命令實現
先創建用戶並設置密碼；

1. create user test@’10.0.0.%’ identified by ‘test123’;
3. 再對用戶授權指定權限和管理庫表
4. grant all on *.* to test@10.0.0.0/255.255.255.0

最後記得上述每條grant命令都要刷新權限

1. flush privilege

數據庫遠程登錄

1. mysql -uwordpress -poldboy123 -h 172.16.1.51 -P3306
2. -h指定IP地址，-P指定服務端口號

創建類似於root系列的管理員用戶，可以創建下級用戶的用戶

1. grant all privileges on *.* to root@‘127.0.0.1‘ identified by ‘oldboy123‘ with grant option;
2. 只需要在最後輸入with grant option

回收用戶權限

1. REVOKE INSERT ON *.* FROM ‘jeffrey‘@‘localhost‘;

mysql授權