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Virtual Machines
 (
VM
s). 
VirtualBox
 is a 
great solution, as it's easy to use and available for all of the major operating systems. 
Just like Ubuntu itself, VirtualBox is available for free, so it's typically the lowest-cost 
entry-point for getting started. Also, VirtualBox allows you to easily create snapshots 
of your Ubuntu installation, so you can create a point-in-time backup before going 
through an example in this book, and then restore it to repeat tasks as often as 
you'd like. The downside to VirtualBox is that you'll need to be able to dedicate at 
least 1 GB of RAM to your Ubuntu Server VM, and your CPU will need to support 
virtualization extensions, which you'll need to enable in your computer's settings 
if your device supports it.
VirtualBox can be downloaded here: 
https://www.virtualbox.
org
.

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Chapter 1