Mysql root密码丢失

killall -9 mysqld 

或者 /etc/inint.d/mysqld stop 

usr/local/mysql/bin/mysqld_safe --skip-grant-table&

/usr/local/mysql/bin/mysql -u root

use mysql

UPDATE user SET password=password('ABC') WHERE user='root'; 

FLUSH PRIVILEGES; 

service mysqld restart

如果还有其它用户能登录，可以执行 

use mysql

UPDATE user SET password=password('ABC') WHERE user='root';  

然后重启mysql即可