Introduction to Linux (Second Edition) (Fultus Technical Library)
Machtelt Garrels is a Linux veteran and freelance trainer. She  learned the importance of mastering the basic concepts about a subject in  order to get the most out of any IT course. She is also a member of The  Linux Documentation Project, where she initially found a fertile ground for  making her work read throughout the world. She writes from practical  experience as a long-time Linux user, administrator, support engineer and  instructor.