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 13

  1. C The userdel command deletes an account, and the -r option to userdel causes it to delete the user’s home directory and mail spool, thus satisfying the terms of the question. Option A deletes the account but leaves the user’s home directory intact. Option B does the same; the -f option forces account deletion and file removal under some circumstances, but it’s meaningful only when -r is also used. Option D’s command will probably have no effect, since rm works on directories only in conjunction with -r, and /home/nemo is probably the user’s home directory. Option E’s rm command deletes the user’s home directory (assuming that it’s located in the conventional place, given the username), but it doesn’t delete the user’s account.
  2. B The password in option B uses a combination of upper- and lowercase letters, numbers, and symbols, and it doesn’t contain any obvious word. Furthermore, it’s a long...