Pipkin, Donald L. Halting the hacker : a practical guide to computer security / - 2nd ed. - Upper Saddle River, New Jersey : Prentice Hall PTR, c2003. - xxii, 347 pages : Illustrations ; - Hewlett-Packard professional books, . Includes index. ISBN: 9780130464163 0130464163 Subjects--Topical Terms: UNIX (computer file)Computer security. LC Class. No.: QA 76.9 / PIP