As Linux is a Unix-like operating system, a general familiarity
with fundamental Unix concepts such as the Unix directory
hierarchy and file permissions is essential. Fortunately, there
are many Unix tutorials online that collectively cover
everything a user might need to know to use Linux. I suggest you
bookmark the following as an online reference library: The
Wikipedia Unix article is a good place to start. It includes an
Unix history, explains some Unix concepts and includes an
explanation of basic commands and some relevant links. Eric S.
Raymond's The Unix and Internet Fundamentals HOWTO is a good
document to learn about the Unix concepts. The UNIX Tutorial for
Beginners of the University of Surrey is a good step by step
tutorial for beginners. The Command and Shell User's guide from
Digital Equipment Corporation is an excellent guide to the Unix
Operating System. Bookmark the Index Page linked there as an
online reference. UNIXhelp is mirrored on many servers around
the world. It is a useful resource f