"In a world full of volumes like Linux: The Complete
Reference, Debian GNU/Linux 2.1 Unleashed, Corel Linux for Dummies
and so forth, Lasser's Think Unix is a breath of fresh air.
Rather than trying to be a detailed guide to a particular system, a
comprehensive reference work, or a source of answers to particular
problems, Lasser tries to teach the fundamental concepts of Unix
and the Unix way of thinking. He also captures something of the way
in which Unix is a way of life and a culture, not just an operating
system, with a good leavening of humour, history, and hackish lore.
One consequence of this approach is that Think Unix will date far
less quickly than most operating system books. I recommend it to
computer science students, techies coming from non-Unix
backgrounds, or anyone more interested in understanding the
underlying ideas of Unix than solving particular problems."