P A R T 6
A P P E N D I X A
Introducing the BASH Shell
As you learn in Chapter 1, strictly speaking, the word Linux refers to just the kernel, which is the fundamental, invisible program that runs your PC and lets everything happen. However, on its own, the kernel is completely useless. It needs programs to let users interact with the PC and do cool stuff, and it needs a lot of system files (also referred to as libraries) to provide vital functions.
The GNU Project provides many of these low-level pieces of code and programs. This ...