Plenty of websites offer valuable information on how to use a command,
but you've probably got quite a bit of documentation already on your
system. In the following chapters, you'll learn:
How to read and print man pages and
info pages. Man and info pages are system
documents which can help you understand what many commands are for
and how to use them.
How to use the GNOME and KDE help browsers.
Some useful online resources you should bookmark in your browser.
And in Appendix B, you'll find a brief history of Linux --
and Red Hat.