linux mysql下忘记root密码解决办法

1 修改MySQL的登录设置

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# vi /etc/my.cnf 

在[mysqld]的中加上一句：skip-grant-tables 

2 重新启动mysqld

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# /etc/init.d/mysqld restart 

Stopping MySQL: [ OK ] 

Starting MySQL: [ OK ] 

3 登录并修改MySQL的root密码

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# /usr/bin/mysql 
Welcome to the MySQL monitor. Commands end with ; or g. 
Your MySQL connection id is 3 to server version: 3.23.56 
Type 'help;' or 'h' for help. Type 'c' to clear the buffer. 
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 ( 'new-password' ) WHERE User = 'root' ; 
Query OK, 0 rows affected (0.00 sec) 
Rows matched: 2 Changed: 0 Warnings: 0 
mysql> flush privileges ; 
Query OK, 0 rows affected (0.01 sec) 
mysql> quit 
Bye 

4 将MySQL的登录设置修改回来 

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# 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。 

5 重新启动mysqld 

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# /etc/init.d/mysqld restart 
Stopping MySQL: [ OK ] 
Starting MySQL: [ OK ]

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