1.如果您没有忘记密码的情况下,可以通过UPDATE直接编辑user表来修改密码: 进入数据库mysql -u root mysql> use mysql; mysql> UPDATE user SET Password = PASSWORD('newpass') WHERE user = 'root'; mysql> FLUSH PRIVILEGES; 2.如果您已经忘记密码: # /etc/init.d/mysql stop 1、结束当前正在运行的mysql进程。 # /usr/bin/mysqld_safe --skip-grant-tables 2、用mysql安全模式运行并跳过权限验证。 # mysql -u root 3、重开一个终端以root身份登录mysql。 mysql> use mysql; 4、修改root用户口令。 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 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 mysql> exit # /etc/init.d/mysql restart 5、结束mysql安全模式,用正常模式运行mysql。 mysql> update mysql.user set password=PASSWORD('新密码') where User='root'; 6、试试你新修改的口令 mysql> flush privileges; mysql> quit