最近研究一下MySQL 5.6 版本發現安裝后，使用空密碼無法登陸

安裝的過程中有這樣的一句話：

A RANDOM PASSWORD HAS BEEN SET FOR THE MySQL root USER !

You will find that password in '/root/.mysql_secret'.

You must change that password on your first connect,

no other statement but 'SET PASSWORD' will be accepted.

See the manual for the semantics of the 'password expired' flag. 大概意思就是 一個隨機的密碼已經生成 可以在 ?'/root/.mysql_secret'. 中找到 第一次連接必須變更密碼 且只能使用 'SET PASSWORD' 命令 在user 表中新增加了'password expired' ?列，也就是密碼過期 我們來啟動mysql 然后登陸 service mysql start mysql -uroot -pvssAWF0O #密碼是在 more .mysql_secret ?里面記錄 # The random password set for the root user at Mon Mar 25 11:13:11 2013 (local time): vssAWF0O Warning: Using a password on the command line interface can be insecure. Welcome to the MySQL monitor. ?Commands end with ; or g. Your MySQL connection id is 1 Server version: 5.6.10 Copyright (c) 2000, 2013, 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. mysql> select 1; ERROR 1820 (HY000): You must SET PASSWORD before executing this statement #提示必須現更改密碼才能執行語句 mysql> set password=password('password2013'); Query OK, 0 rows affected (0.00 sec) mysql> select 1; +---+ | 1 | +---+ | 1 | +---+ 1 row in set (0.03 sec) mysql> 5.6版本的安全性大大增強了，其他的新特性的等待后續研究！

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