Before skipping to the next chapter, let's devote some minutes to the installation of MySQL.
In Chapter 8 you will begin working with databases from PDI. In order to do that, you will need access to some database engine. As MySQL is the world's most popular open source database, it was the database engine chosen for the database-related tutorials in the book.
In this section you will learn to install the MySQL database engine both in Windows and Ubuntu, the most popular distribution of Linux these days. As the procedures for installing the software are different, a separate explanation is given for each system.