Linux下MySQL的root密码忘记解决方法

Linux下MySQL的root密码忘记解决方法

验证环境：

[root@localhost ~]# rpm -qa | grep mysql

mysql-5.1.71-1.el6.i686

mysql-server-5.1.71-1.el6.i686

mysql-libs-5.1.71-1.el6.i686

[root@localhost ~]# lsb_release -a

LSB Version:    :core-4.0-ia32:core-4.0-noarch:graphics-4.0-ia32:graphics-4.0-noarch:printing-4.0-ia32:printing-4.0-noarch

Distributor ID: CentOS

Description:    CentOS Linux release 6.0 (Final)

Release:        6.0

Codename:      Final

[root@localhost ~]# uname -r

2.6.32-71.el6.i686

 

 

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： 

# vi /etc/my.cnf 

在[mysqld]的段中加上一句：skip-grant-tables

例如： 

[mysqld] 

datadir=/var/lib/mysql 

socket=/var/lib/mysql/mysql.sock 

skip-grant-tables 

保存并且退出vi。

3．重新启动mysqld 

# /etc/init.d/mysqld restart 

Stopping MySQL: [ OK ] 

Starting MySQL: [ OK ]

4．登录并修改MySQL的root密码

[root@localhost ~]# mysql

Welcome to the MySQL monitor.  Commands end with ; or \\g.

Your MySQL connection id is 3

Server version: 5.1.71 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>UPDATE mysql.user SET Password = password ("new-password") WHERE User = 'root';

Query OK, 3 rows affected (0.00 sec)

Rows matched: 3  Changed: 3  Warnings: 0
mysql> flush privileges;
mysql> exit
Bye

5．将MySQL的登录设置修改回来 

# 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．再次重新启动mysqld 

# /etc/init.d/mysqld restart 

Stopping MySQL: [ OK ] 

Starting MySQL: [ OK ]

7、使用新的密码登录，正常登录，搞定！