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)
17
EULA

Chapter 8

  1. A The grep utility finds matching text within a file and prints those lines. It accepts regular expressions, which means that you can place in brackets the two characters that differ in the words for which you’re looking. Option A shows the correct syntax for doing this. The tar utility creates or manipulates archive files, and option B’s syntax is incorrect for any use of tar, so that option is incorrect. The find utility locates files based on filenames, file sizes, and other surface features. Furthermore, options C and E both present incorrect syntax for find, and so are incorrect. Option D’s cat utility displays or concatenates files, so it won’t have the desired effect and this option is wrong.
  2. E The >> operator appends standard output to a file, so option E is correct. The vertical bar (|) is the pipe character; it ties one program’s standard output to another’s standard input, so option A is incorrect. The 2> operator...