Reflecting the changes made in UNIX System V Release 4.2, the Third Edition of this bestseller is the most up-to-date and comprehensive reference available. For novice and experienced user alike, it provides a thorough introduction to UNIX, covering the operating system, utilities, shell programming, the vi editor, job control, system administration, and much more. New chapters include: Graphical User Interface (GUI), Networking, EMACS, and the KornShell. New appendices cover the POSIX standards and the version-specific features of AIX, HPUX, and SCO UNIX. More than 70 of the most frequently used UNIX utilities-including awk, make, SCCS, sed, and sort-are described in detail.