Book Image

Linux Essentials - Second Edition

By : Christine Bresnahan, Richard Blum
Book Image

Linux Essentials - Second Edition

By: Christine Bresnahan, Richard Blum

Overview of this book

Linux Essentials, Second Edition provides a solid foundation of knowledge for anyone considering a career in information technology, for anyone new to the Linux operating system, and for anyone who is preparing to sit for the Linux Essentials Exam. Through this engaging resource, you can access key information in a learning-by-doing style. Hands-on tutorials and end-of-chapter exercises and review questions lead you in both learning and applying new information—information that will help you achieve your goals! With the experience provided in this compelling reference, you can sit down for the Linux Essentials Exam with confidence. An open-source operating system, Linux is a UNIX-based platform that is freely updated by developers. The nature of its development means that Linux is a low-cost and secure alternative to other operating systems, and is used in many different IT environments. Passing the Linux Essentials Exam prepares you to apply your knowledge regarding this operating system within the workforce.
Table of Contents (19 chapters)

What Is a Distribution?

Up until now, we’ve described Linux as if it were a single OS, but this isn’t really the case. Many different Linux distributions are available, each consisting of a Linux kernel along with a set of utilities and configuration files. The result is a complete OS, and two Linux distributions can differ from each other as much as either differs from OS X or Windows. We therefore describe in more detail what makes up a distribution, what distributions are popular, and the ways in which distribution maintainers keep their offerings up-to-date.

Creating a Complete Linux-Based OS


We’ve already described some of what makes up a Linux OS, but some details need reiteration or elaboration:

A Linux Kernel A Linux kernel is at the core of any Linux OS, of course. We’ve written this item as a Linux kernel because the Linux kernel is constantly evolving. Two distributions are likely to use slightly different kernels. Distribution maintainers also...