If you're performing a mass database backup using mysqldump, you'll pretty much find it annoying to type in the password every single time.

To get rid of it, open /etc/mysql/my.cnf configuration file and add your database credentials:

[mysqldump]
user="your_username"
password="your_password"

Once done, save the my.cnf configuration file and now, you can try exporting your database without a hassle like this:

mysqldump -u your_username database_name > database.sql

Hope this trick helps you out!