Stop the MySQL process

$ service mysqld stop

Once MySQL has stopped

Restart it with the –skip-grant-tables option

$ mysqld_safe --skip-grant-tables &

Connect to MySQL using the root user.

$ mysql -u root

Once logged in, you should see the following prompt:

mysql>

Tell MySQL which database to use:

mysql> use mysql;

Enter the new password for the root user as follows:

mysql> UPDATE user SET password=PASSWORD("YOUR NEW PASSWORD HERE") WHERE User='root';

Flush the privileges:

mysql> flush privileges;

Exit MySQL:

mysql> quit

Now stop MySQL again:

$ service mysqld stop

Now restart MySQL and test your new login.

$ service mysqld restart
$ mysql -u root -p