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)

Chapter 9

  1. E The apt-get utility is a network-enabled tool that can resolve dependencies and retrieve all of the required packages to install a package that you specify. Debian and its derivatives all use it, so option E is correct. The yum and zypper programs are conceptually similar to apt-get, but they work on Red Hat (and its derivatives) and SUSE distributions, respectively, so options A and B are both incorrect. The dmesg program displays the kernel ring buffer; it has nothing to do with package management, so option C is incorrect. The rpm program is a non-network-enabled program for managing packages on an RPM-based system, not on a Debian system, so option D is incorrect.
  2. A Typically, Linux starts init as the first process, so option A is correct. bash is a Linux text-mode shell program. Although it’s important for user interaction, it’s far from the first process Linux starts. The cron daemon manages timed execution of programs to handle routine maintenance tasks...