Ubuntu下忘記MySQL密碼重設方法

1、結束當前正在運行的mysql進程。

# /etc/init.d/mysql stop

2、用mysql安全模式運行並跳過權限驗證。
# /usr/bin/mysqld_safe --skip-grant-tables

3、重開一個終端以root身份登錄mysql。
# mysql -u root

4、修改root用戶口令。
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 -A

Database 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、結束mysql安全模式，用正常模式運行mysql。
# /etc/init.d/mysql restart

6、試試你新修改的口令
 
mysql> show grants for 'root'@'127.0.0.1'; 

mysql> flush privileges；
mysql> quit