In this chapter, the reader will learn some of the biggest differences between the Samba software Versions 3 and 4, and based on that, will understand the impact and the relevant considerations before planning a successful upgrade. The main aspects of such differences will be focused on the different working models and the new features and benefits that the upgrade can leverage. We will go over the plan, tests, and validations that the reader needs to pay attention in order to be able to execute and help evaluate the success of such an upgrade procedure.

Scripts and command-line examples will be used to help the readers identify where to look, what information might be important to gather, and how to compare the final result to the prior environment from a functional standpoint.

We will learn about a step-by-step procedure to execute the upgrade and all the commands and scripts needed to go from Samba 3 to Samba 4's fully functional Domain Controller...