故障現場：登陸到MySQL伺服器,不管你執行什麼命令都報這個錯

1. mysql> show databases;
2. ERROR 1820 (HY000): You must reset your password using ALTER USER statement before executing this statement.
3. mysql> use test;
4. ERROR 1820 (HY000): You must reset your password using ALTER USER statement before executing this statement.
5. ...
6. ...

仔細看哈，Note資訊有時候比上面的資訊有用（英文的note我一般都是忽略的，有可能你忽略掉的那部分對效能也有幫助哦）

問題解決：在開源的世界裡，我們不怕報錯，有報錯才有解決思路。下面來看下自己環境裡的

1. mysql> select version();
2. +--------------+
3. | version() |
4. +--------------+
5. | 5.7.10-3-log |
6. +--------------+
7. 1 row in set (0.01 sec)
9. mysql> show variables like 'default_password_lifetime';
10. +---------------------------+-------+
11. | Variable_name | Value |
12. +---------------------------+-------+
13. | default_password_lifetime | 360 |
14. +---------------------------+-------+
15. 1 row in set (0.00 sec)

alter user user() identified by "123456";