Chapter 2. Unix History and Lineage
This is a book about Unix security. But before we can really plunge
into the topic of our book—security—we need to explore
what we mean by this word "Unix."
After that, we'll discuss how notions of computer
security play out in the Unix world. Figure 2-1
shows the many Unix variants, and their relationships, that
we'll describe in this chapter.
Figure 2-1. Unix variants