linux修改root密码

1>修改MySQL的登录设置：

 

# vi /etc/my.cnf

 

在[MySQLd]的段中加上一句：skip-grant-tables

 

例如：

 

Java代码

[MySQLd]
datadir=/var/lib/MySQL
socket=/var/lib/MySQL/MySQL.sock
skip-name-resolve
skip-grant-tables
[MySQLd]
datadir=/var/lib/MySQL
socket=/var/lib/MySQL/MySQL.sock
skip-name-resolve
skip-grant-tables

 

保存并且退出vi。

 

2>重新启动MySQLd

 

# /etc/init.d/MySQLd restart
Stopping MySQL: [ OK ]
Starting MySQL: [ OK ]

 

3>登录并修改MySQLroot密码

 

Xml代码

# /usr/bin/MySQL
.
MySQL> USE MySQL ;
MySQL> UPDATE user SET Password = password('new-password') WHERE User = 'root' ;
MySQL> flush privileges ;
MySQL> quit
# /usr/bin/MySQL
.
MySQL> USE MySQL ;
MySQL> UPDATE user SET Password = password('new-password') WHERE User = 'root' ;
MySQL> flush privileges ;
MySQL> quit

4>将MySQL的登录设置修改回来

 

# vi /etc/my.cnf

 

将刚才在[MySQLd]的段中加上的skip-grant-tables删除

 

保存并且退出vi。

 

5>重新启动MySQLd

 

# /etc/init.d/MySQLd restart
Stopping MySQL: [ OK ]
Starting MySQL: [ OK ]