Ubuntu下忘记MySQL密码重设方法

1、结束当前正在运行的mysql进程。

# /etc/init.d/mysql stop

2、用mysql安全模式运行并跳过权限验证。

# /usr/bin/mysqld_safe --skip-grant-tables

3、重开一个终端以root身份登录mysql。

# mysql -u root

4、修改root用户口令。

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 -ADatabase changed

mysql> update user set Password = PASSWORD('root') where User ='root';
Query OK, 3 rows affected (0.00 sec)Rows matched: 3  Changed: 3  Warnings: 0

mysql> exit

5、结束mysql安全模式，用正常模式运行mysql。

# /etc/init.d/mysql restart

6、试试你新修改的口令

mysql> show grants for 'root'@'127.0.0.1'; 
mysql> flush privileges；
mysql> quit;

转自：http://www.cnblogs.com/yuxc/archive/2012/07/25/2607587.html