Bill Calkins is owner and president of Pyramid Consulting, a computer training and consulting firm located near Grand Rapids, Michigan, specializing in the implementation and administration of UNIX and Windows NT-based systems. He has more than 17 years of experience in UNIX system administration and consulting at more than 90 different companies. He has also worked as an instructor in both corporate and university settings, and he has helped hundreds of administrators get their certification. His experience covers all varieties of UNIX, including Solaris, HP-UX, AIX, IRIX, Linux, and SCO. When he's not working in the field, he conducts training and educational seminars on various system administration topics. He draws on his many years of experience in system administration and training to provide a unique approach to UNIX training.