<p>This volume offers practical insights into the function and operation of the most widely-used UNIX internal facilities and external utilities. The book covers System Release 4 which encompasses the AIX, SUNOS, ULTRIX, ZENIX and BSD versions of UNIX. It is intended as a rapid access reference for programmers developing programs tailored to the underlying structures of UNIX and for system administrators seeking efficient methods of installing, configuring and maintaining UNIX systems.</p>