Before we can automate something, we need to understand the corresponding manual process.
Throughout this book, it is assumed that we are using a Red Hat-based Linux distribution, such as Fedora or CentOS. Most Linux distributions are similar in principle, except that the command set used for package operations will perhaps differ a bit.
For the exercises, you can either use a physical server or a virtual machine installed in VirtualBox.
First, we need the PostgreSQL relational database. Use this command:
dnf install postgresql
This will check whether there is a PostgreSQL server installed already. Otherwise, it will fetch the PostgreSQL packages from a remote yum repository and install it. So, on reflection, many of ...
