The software development life cycle is the diagram of our day to day activity as software engineers wait, this book is about DevOps; what are we doing talking about software engineering? Well, in theory, DevOps is the role of the IT activity that covers the full life cycle of a software component, from the inception to the release and further maintenance. Nowadays, many companies are hiring DevOps engineers on the basis of hiring system administrators on steroids that even though it works, it completely misses the biggest advantage of the DevOps role: having someone on the team with exposure to all the aspects of the software so that problems can be solved quickly without involving people from different teams in the majority of the cases.

Before proceeding further, let's take a look at how the software development life cycle works:

This is the most classical and studied software development life cycle in IT literacy, something that everyone has gone through...