忘记MySql的root密码解决方案

1．首先确认服务器出于安全的状态，也就是没有人能够任意地连接MySQL数据库。因为在重新设置MySQL的root密码的期间，MySQL数据库完全 出于没有密码保护的状态下，其他的用户也可以任意地登录和修改MySQL的信息。可以采用将MySQL对外的端口封闭，并且停止Apache以及所有的用 户进程的方法实现服务器的准安全状态。最安全的状态是到服务器的Console上面操作，并且拔掉网线。

2．修改MySQL的登录设置：
[root@CentOS ~]# vi /etc/my.cnf
在[mysqld]的段中加上一句：skip-grant-tables
例如：

[mysqld]  
<span style="color: #ff0000;">skip-grant-tables</span>  
datadir=/var/lib/mysql  
socket=/var/lib/mysql/mysql.sock  
user=mysql  
# Disabling symbolic-links is recommended to prevent assorted security risks  
symbolic-links=  

保存并且退出vi。

3．重新启动mysqld
[root@CentOS ~]# service mysqld restart
Stopping mysqld: [OK]
Starting mysqld: [OK]

4．登录并修改MySQL的root密码

[root@CentOS ~]# /usr/bin/mysql  
Welcome to the MySQL monitor. <wbr></wbr> Commands end with ; or \g.  
Your MySQL connection id is 2  
Server version: 5.1.69 Source distribution 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> USE mysql;  
Reading table information for completion of table and column names  
You can turn off this feature to get a quicker startup with -A

Database changed  
mysql> UPDATE user SET Password = password ( ‘NewPassword’ ) WHERE User = ‘root’ ;  
Query OK, 3 rows affected (0.00 sec)  
Rows matched: 3 <wbr></wbr> Changed: 3 <wbr></wbr> Warnings: 0

mysql> flush privileges;  
Query OK, 0 rows affected (0.00 sec)

mysql> quit  
Bye

5．将MySQL的登录设置修改回来
[root@CentOS ~]# vi /etc/my.cnf
将刚才在[mysqld]的段中加上的skip-grant-tables删除
保存并且退出vi。

6．重新启动mysqld
[root@CentOS ~]# service mysqld restart
Stopping mysqld: [OK]
Starting mysqld: [OK]