重置mysql的root用户密码

/etc/rc.d/init.d/mysql status

/etc/rc.d/init.d/mysql stop

mysqld_safe --skip-grant-tables&

　　mysql -u root mysql

　　mysql> UPDATE user SET password=PASSWORD("new password") WHERE user='root';

　　mysql> FLUSH PRIVILEGES;

/etc/rc.d/init.d/mysql  start