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