Forgetting the MySQL login password under Linux system will teach you to change it in two simple steps

First , You have to have an operating system root Yes . If it's connected to the system root Without authority , I suggest you find a way
Think about it first root user , Take the following steps .

/etc/init.d/mysqld stop
mysqld_safe --skip-grant-tables &

&, Means running in the background , No longer running in the background , Just open another terminal .

mysql
mysql> use mysql;
mysql> UPDATE user SET password=password(" Password to change ") WHERE user='root';
mysql> flush privileges;
mysql> exit;
mysql> quit

The proper change is over , You'd better record the password ！