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)

Exploring Linux through the Ages

Although Linux’s birth date of 1991 is recent by most historical standards, in the computer world 25 years is an eternity. The software and culture in the early 1990s, and even before then, has conveyed quite a legacy to today’s software world. After all, what we use today is built atop the foundation that was created in the past. Thus looking at how Linux originated will help you understand Linux as it exists today.

Understanding Linux’s Origins

In 1991, as is also true today, computers were classified by their sizes and capabilities. Computers could belong to any of a handful of categories, ranging from desktop personal computers (PCs) to supercomputers. x86-based computers, which are the direct ancestors of today’s PCs, dominated the PC marketplace of 1991; however, other types of PCs were available, including Macs. Such computers generally used different CPUs and ran their own custom OSs.