Preface
I wrote this book to create the most useful, effective, informative, and
educational resource for readers who intend to learn Linux and want to prepare for
the CompTIA Linux+/LPIC-1 certification exams, LX0-103/101-400 and LX0-
104/102-400. I am confident that I have attained these objectives in this finished
product.
In each chapter, I categorized the exam objectives according to the flow of the
discussion and where they appeared to best support a convenient and logical learning
path. I encourage readers to read each chapter chronologically, learn a concept,
command, or topic, try it, ponder over the results, and move on to the next topic.
Jumping around may result in confusion, frustration, and spending more time than
required.
At the very outset in chapter 1, I furnished assistance to build a lab environment
for practicing. Do not skip this chapter. As you read the book, please have your
Linux lab systems up and running and switch user IDs or systems as depicted in the
command prompt in order to get the most out of your time and effort. Each
command demonstrated in this book was actually run on the indicated system and as
the indicated user. Do not expect to see an identical output or behavior of a
command or program on your lab system. Differences might occur due to variances
in hardware configuration or software versions.
The CompTIA Linux+ Powered by LPI/LPIC-1 certification exams are
distribution-neutral and vendor-neutral, which means that the exam objectives are
not specific to any particular Linux distribution or vendor. However, a closer look at
the objectives indicates that they are taken from two major distributions of Linux—
Red Hat Enterprise Linux (RHEL) and Debian Linux—and they include topics from
the distributions’ latest as well as old versions. I, therefore, opted for CentOS Linux
(a popular offshoot of RHEL) and Ubuntu Linux (a Debian Linux spinoff) to base
the book material.
At the end of each chapter, I have provided an at-a-glance review of the entire
chapter, which provides a one-sentence review of key topics discussed in that
chapter. The two certification exams are multiple-choice and fill-in-the-blank, so I
have provided one quiz per exam that contains sample questions with answers in the
appendices. It is recommended to take the first quiz after you have completed Part
One and the second quiz after finishing Part Two.
I maintain www.getitcertify.com to support my readers with errata, additional
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