Dr. Chris Brown has been using UNIX for more than 25 years, initially in his role as a Research Fellow at Sheffield University in the UK, where he carried out research into the use of tightly coupled multiprocessor systems for real-time processing of machine vision data. He has been a Linux enthusiast, user, and advocate for the last seven years and holds RedHat RHCE and Novell CLP certifications, in addition to B.A. and M.A. degrees from Cambridge University and a PhD in particle physics, which he hopes won't put you off reading his book. Chris has authored a number of hands-on training courses on Linux TCP/IP networking, systems programming, and administration. Working for a while in the USA, he managed the development of a Linux training curriculum for the training company Learning Tree International. Chris now works mostly as a freelance trainer and writer and has delivered training throughout North America and Europe for companies including Learning Tree, IBM Learning Services, and First Technology Transfer. Chris has been heavily involved in providing technical training within Novell. He wrote two five-day courses on SuSE Linux, which he delivered to Novell's consultants and IT support staff within Europe. He was also invited to deliver internal training sessions at Novell's Brainshare conference in 2004. Subsequently, Chris has been working with Novell throughout Europe to provide training to staff on Novell Linux Desktop in support of Novell's internal migration to Linux. His own company, Interactive Digital Learning, provides training content and consultancy, and also specializes in computer-based classroom training delivery systems. In his spare time Chris enjoys Bach, Jake Thackray, Flanders and Swan, gardening, reading, eating, and sleeping.