What you need for this book
This book requires you to have one or more computers at your disposal that are capable of running either Debian or CentOS, preferably both. It really doesn't matter if you run them on a virtual machine or physical hardware, as the only requirement is that you should be able to install one or both of these distributions and access them via a terminal. Root level access is required for these installations.
While you can certainly use any Linux installations you may already have, it's highly recommended to have separate, fresh installations to work with, as some of our topics can be disruptive if they are run on production networks. If you are in doubt, VirtualBox or older machines that you may have lying around will do ...
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