Linux: A First View
Linux has four major parts:
- The kernel
The low-level operating system, handling files, disks, networking, and other necessities we take for granted. Most users rarely notice the kernel.
- Supplied programs
Thousands of programs for file manipulation, text editing, mathematics, web browsing, audio, video, computer programming, typesetting, encryption, DVD burning…you name it.
- The shell
A user interface for typing commands, executing them, and displaying the results. Linux has various shells: the Bourne shell, Korn shell, C shell, and others. This book focuses on bash, the Bourne-Again Shell, which is often the default for user accounts. However, all these shells have similar basic functions.
- X
A graphical system that provides windows, menus, icons, mouse support, and other familiar GUI elements. More complex graphical environments are built on X; the most popular are KDE and GNOME. We’ll discuss a few programs that open X windows to run.
This book focuses on the second and third parts: supplied programs and the shell.
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