mysql的root密码忘记的解决办法

第一步：(停掉正在运行的mysql)

[root@CentOs5 ~]# service mysqld stop  

Stopping MySQL:                                            [  OK  ]

 

第二步：使用 “--skip-grant-tables”参数重新启动mysql
[root@CentOs5 ~]# mysqld_safe --skip-grant-tables &

[1] 23810

[root@CentOs5 ~]# Starting mysqld daemon with databases from /var/lib/mysql

 

第三步：用帐号登录mysql

[root@CentOs5 ~]# mysql -u root

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

Your MySQL connection id is 1

Server version: 5.0.77 Source distribution

Type 'help;' or '\h' for help. Type '\c' to clear the buffer.

 

第四步：改变用户数据库

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

 

第五步：修改密码，记得密码要用password()函数进行加密，一定不要忘记！！！
mysql> update user set password=password('admin123') where user='root';

Query OK, 1 row affected (0.04 sec)

Rows matched: 1  Changed: 1  Warnings: 0

 

第六步：刷新权限表

mysql> flush privileges;

Query OK, 0 rows affected (0.00 sec)

 

第七步：退出mysql
mysql> quit

Bye

第八步：对mysql进行重启
[root@CentOs5 ~]# service mysqld restart;

STOPPING server from pid file /var/run/mysqld/mysqld.pid

100421 13:44:03  mysqld ended

Stopping MySQL:                                            [  OK  ]

Starting MySQL:                                            [  OK  ]

[1]+  Done                    mysqld_safe --skip-grant-tables

 

第九步：用更改过的密码重新登录即可。
[root@CentOs5 ~]# mysql -u root -p

Enter password: admin123

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

Your MySQL connection id is 2

Server version: 5.0.77 Source distribution

Type 'help;' or '\h' for help. Type '\c' to clear the buffer.

mysql> quit

Bye