IMPROVING THE SECURITY OF YOUR UNIX SYSTEM
David A. Curry · 1990
This document describes the security features provided by the operating system, and how UNIX S O f they should be used. The discussion centers around version 4.x of Sun , the version o sold by Sun Microsystems. Most of the information presented applies equally well UNIX UNIX to other systems. Although there is no way to make a computer completely secure e i against unauthorized use (other than to lock it in a room and turn it off), by following th nstructions in this document you can make your system impregnable to the "casual" sys-