Linux Essentials

Linux Essentials

Christine Bresnahan

Language: English

Pages: 360

ISBN: 111909206X

Format: PDF / Kindle (mobi) / ePub

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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System (X for short), and the MIT license (sometimes called the X11 license) continues to be used for Xorg-X11—the implementation of X included with many Linux distributions. The MIT license is unusually short. Apache Like the BSD and MIT licenses, the Apache license is an open source license that permits redistribution under the same or another license. If a text file called NOTICE comes with the original work, it must be included in any derived work. This enables the original developer to

Preemptive Multiuser Cooperative Single-tasking Single-user Which of the following is a characteristic of all open source software? The software cannot be sold for a profit; it must be distributed free of charge. It must be distributed with both the source code and binaries. Users are permitted to redistribute altered versions of the original software. The software was originally written at a college or university. The software must be written in an interpreted language that requires

this, the filesystem may suffer damage. Some devices, such as optical disc drives, can lock their eject mechanisms to prevent forced removal of the media. Figure 5.3 Linux file managers enable you to unmount removable media. Most removable disks either are unpartitioned or have a single partition. They frequently use FAT, which is a good choice for cross-platform compatibility. If you need to, you can partition USB flash drives and most other removable media. Optical discs are unusual

$ cut -f 7 -d ":" /etc/passwd | grep bash You are not limited to one pipe in your command line. For example, you can make the previous example more useful by putting in a second pipe. To determine the number of users who have the bash shell in their /etc/passwd record, another pipe is used and the wc command is tacked onto the pipeline’s end: $ cut -f 7 -d ":" /etc/passwd | grep bash | wc -l 237 In the previous example, three commands were included in the pipeline. There are 237 user accounts

can extract specified data fields from a file’s records. Complete the following command to redirect both standard output and a standard error from the bigprog program to the file out.txt. $_____ bigprog out.txt The gzip, bzip2, and xz programs all perform _____________ compression, in which the uncompressed data exactly matches the original precompression data. CHAPTER 9 Exploring Processes and Process Data Computers are dynamic and multipurpose machines; they use many tools to do

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