Remove anonymous user from MySQL

MySQL includes an anonymous user account that allows anyone to connect into the MySQL server without having a user account. This is meant only for testing, and should be removed before the database server is put into a production environment.
Run the following SQL script against the MySQL server to remove the anonymous user account:

DELETE FROM mysql.user WHERE User='';

After making changes to permissions/user accounts, make sure you flush the provilege tables using the following command:

FLUSH PRIVILEGES;