If you use Red Hat Linux 6 to enjoy the Gnome productivity suites and Corel WordPerfect, it's quite possible that you may never need to use Linux at the commant line. But if you are a powr user, or if you just want to know what is going on "beneath the hood," this part is for you.
Chapter 10: The Bash Shell explains the concept of Linux shells, and provides information about working with the bash shell
Chapter 11: Files, Processes, and Permissions covers working with files. After you read the chapter, you will understand the concepts of ownership and permissions.
Chapter 12: Shell Scripting and Programming explains how to get started writing bash shell scripts. You'll also learn about some of the other great developement tools that ship with Red Hat Linux 6.