1、用帐号登录mysql
mysql –u root
或#mysql –uroot –p
2、改变用户数据库
命令：mysql>use mysql
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
3、修改密码
密码要用password()函数进行加密！！！！
命令：mysql> update user set password=password('root') where user='root';
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
4、刷新权限表
命令：mysql> flush privileges;
mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)
5、退出mysql并对mysql进行重启即可！！
service mysqld restart
