I don't understand the reason for those instructions, perhaps they've explained it somewhere, but here's what you need to know:
1. There are various Linux distributions, not just one. You can read about the many Linux distributions, here: http://www.linux.com/distributions/
2. I'm not sure what Ubuntu book you've got, but if it has a CD, it must be a installable Ubuntu disk. Ubuntu is a Linux distribution. Red Hat also is a Linux distribution. Many years ago, Red Hat Linux was broken into two different distributions. The commercial Red Hat distro is now known as Red Hat Enterprise Linux while the community distribution is known as Fedora.
3. You can use Ubuntu without installing it to your hard disk. This is possible because Ubuntu is a Live CD distribution, which means when you boot from the Ubuntu disk, you are presented with a working Linux environment without installing anything. You can, once you're comfortable or feel you're reader, install Ubuntu from the same disk, following the installation chapter in the book you've got.
4. Red Hat is not a driver. Red Hat is a very prominent Open Source company that itself makes Linux distributionss.
5. You can read about distributions, and find download information at the link I already provided or from the http://distrowatch.com website.
6. When installing Ubuntu or any other Linux distribution for that matter, be sure to install the boot-loader. Your book would obviously mention this. The boot-loader will allow you to choose whether to boot into Windows or Linux every time you turn on your machine.
Cheers!
Coauthor of Beginning Fedora: From Novice to Professional published by Apress.
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