第一步：(停掉正在运行的mysql)

[root@maomao
~]# service mysqld stop  

Stopping
MySQL:                                           
[  OK  ]

 

第二步：使用
“--skip-grant-tables”参数重新启动mysql

[root@mcy400
~]# mysqld_safe --skip-grant-tables 

[root@cy400 ~]# Starting mysqld daemon with databases from
/var/lib/mysql

注意：如果停在这一步的时候，请新开SSH登陆接着下一步操作

 

第三步：用帐号登录mysql

[root@cy400 ~]#
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，下面()内的root123为新密码

mysql> update
user set password=password('root123') where user='root';

 

第六步：刷新权限表

mysql>
flush previleges;

ERROR
1064 (42000): You have an error in your SQL syntax; check the manual that
corresponds to your MySQL server version for the right syntax to use near
'previleges' at line 1

 

第七步：退出mysql

mysql>
quit

Bye

 

第八步：对mysql进行重启

[root@cy400 ~]#
service mysqld restart;

Stopping
MySQL:                                           
[  OK  ]

Starting
MySQL:                                           
[  OK  ]

 

第九步：用更改过的密码重新登录即可。

[root@cy400
~]# 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

[root@cy400 ~]#

 

加入如下自动启动命令 /etc/rc.d/init.d/mysqld start