Brian Proffitt is the Managing Editor of the popular Web site Linux Today, and the author of 16 Linux and Open Source works, including The Joy of Linux. His online works are read by nearly a half million people daily.
William von Hagen has been a Unix system administrator since 1982, working on and maintaining computer hardware, operating systems, and system software. In that time, he has worked as a system administrator, systems programmer, software developer, development manager, computing facilities operations manager, writer, documentation manager, and content manager. He has been a Linux fan since 1993, and has used almost every commercial Linux distribution on the x86, PPC, and SPARC platforms. Bill is an established writer, having written three computer books, including "Hacking the TiVo" (Premier Press, 1592001114). He is well-known as an expert on PowerPC Linux systems (such as the TiVo), having written articles and reviews on this subject for Linux Format magazine (UK) and a column on this topic for Maximum Linux magazine. He has written articles for publications including Linux Magazine, Mac Tech Magazine, Mac Home Magazine, Mac Directory, and many others.