Chapter 9. UNIX I: Privileges and Files

“There are two major products that came from Berkeley: LSD and UNIX. We don’t believe this to be a coincidence.”

J. S. Anderson

“First, LSD did not come from Berkeley. LSD was developed in Sandoz labs in Basel, Switzerland. Second, BSD did come from Berkeley, but it is not ‘UNIX.’”

Nick Johnson

Introduction

UNIX is more than just a single operating system; it’s a phenomenon. What started as a hacker’s project to create a functional multi-user operating system has evolved into an array of OSs that all share some basic characteristics and a common ancestor. Writing about UNIX from a technical perspective can be rather intimidating, simply because it’s hard to know what to call this phenomenon. Does UNIX refer ...

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