In this tutorial, we will show you how to install and improve the security of MySQL on Ubuntu 18.04. MySQL is one of the most popular and widely-used open-source relational database management systems. It is used for building web applications such as WordPress, Drupal, Joomla, and Magento, and is an important part of the LAMP/LEMP open-source web application software stacks. At the moment of writing this tutorial, the latest supported version from the official Ubuntu package repository is MySQL 5.7. Let's get started.