Change-set-reset password of mysql using ubuntu

Open terminal and follow below instructions :

1.) Stop the MySQL Server.

sudo /etc/init.d/mysql stop

2.) Start the mysqld configuration.

sudo mysqld --skip-grant-tables &

then press enter

3.) Login with MySQL as root.

mysql -u root mysql

4.) Replace YOURNEWPASSWORD with your new password!

UPDATE user SET Password=PASSWORD('YOURNEWPASSWORD') WHERE User='root'; 

5.) Refresh MySQL:

FLUSH PRIVILEGES; 

6.) Exit

exit;