Linux Essentials

Linux Essentials

Christine Bresnahan

Language: English

Pages: 360

ISBN: 111909206X

Format: PDF / Kindle (mobi) / ePub


Learn Linux, and take your career to the next level!

Linux Essentials, 2nd 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.

  • Access lessons that are organized by task, allowing you to quickly identify the topics you are looking for and navigate the comprehensive information presented by the book
  • Discover the basics of the Linux operating system, including distributions, types of open source applications, freeware, licensing, operations, navigation, and more
  • Explore command functions, including navigating the command line, turning commands into scripts, and more
  • Identify and create user types, users, and groups

Linux Essentials, 2nd Edition is a critical resource for anyone starting a career in IT or anyone new to the Linux operating system.

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expert Fedora Free RPM Approximately 6-month Intermediate Gentoo Free ebuild Rolling Expert Mint Free Debian 6-month Novice to intermediate openSUSE Free RPM 8-month Intermediate Red Hat Enterprise Commercial RPM Approximately 2-year Intermediate Scientific Free RPM Approximately 6-month Intermediate to expert Slackware Free tarballs Irregular Expert SUSE Enterprise Commercial RPM 2–3 years Intermediate Ubuntu Free Debian 6-month Novice to intermediate These features require

syntax to use it as the question specifies. There is no standard root command, so option B is incorrect. The passwd command changes passwords, so option C is incorrect. Although you can use su to execute a single command as root, you must use it with the -c option to do this, as in su -c "cat /etc/shadow", so option D is incorrect. Option E’s admin is a fictitious command, so this option is incorrect. False The whoami command displays your username only. The id command displays your username,

this isn’t always true. Most monitors use an aspect ratio of either 4:3 or 16:9, referring to the ratio of the length to the height of the display. In the best of all possible worlds, Linux will autodetect your monitor’s optimum resolution and set itself to that value whenever you boot the computer. Unfortunately, this sometimes doesn’t work. Keyboard/video/mouse (KVM) switch boxes and extension cables can sometimes interfere with this autodetection, and older monitors might not support the

various disk controllers, network adapters, and USB interfaces, among other things. The x86 CPU uses a(n) __-bit architecture. A computer power supply converts electricity from alternating current to __________________. The _________ standard is a modern video interface that’s commonly used on computer monitors. A piece of software that “talks” to hardware is known as a(n) _________. CHAPTER 6 Getting to Know the Command Line You may think of the command line as an archaic relic from

install the package. This approach, however, can be tedious when a package has many dependencies; you might attempt an installation, find unmet dependencies, download several more packages, find that one or more of them has unmet dependencies, and so on. By the time you’ve tracked down all of these depended-upon packages, you might need to install a dozen or more. Modern distributions provide network-enabled tools to help automate the process. These tools rely on network software repositories,

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