一、更改my.cnf配置文件

编辑/etc/my.cnf文件，在[MysqLd]下添加skip-grant-tables，保存退出。

重启MysqL服务：services MysqLd restart

二、更改root密码

重启MysqLd服务后，执行MysqL命令，进入MysqL命令行：

[root@yeebian ~]# MysqL
Welcome to the MysqL monitor.  Commands end with ; or \g.
Your MysqL connection id is 2
Server version: 5.1.73 Source distribution
 
Copyright (c) 2000,2013,Oracle and/or its affiliates. All rights reserved.
 
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
 
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
 
MysqL>

修改root密码

MysqL> UPDATE MysqL.user SET Password=PASSWORD('MysqLadmin') where USER='root';
Query OK,0 rows affected (0.00 sec)
Rows matched: 3  Changed: 0  Warnings: 0
 
MysqL> flush privileges;
Query OK,0 rows affected (0.00 sec)
 
MysqL> exit
Bye