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)

Understanding Network Features


Networking involves numerous protocols and technologies that interact in complex ways. Although modern networks and OSs make it easy for users to set up their computers (at least compared to 10 or 20 years ago) doing anything but the simplest configuration requires understanding the key networking protocols and technologies. To begin, we present the following mini-glossary of networking terms:

DNS The Domain Name System (DNS) is a global network of servers that translate between hostnames and IP addresses (both described shortly). Most computers are configured to use a DNS server, which is a server that performs DNS lookups.

DHCP The Dynamic Host Configuration Protocol (DHCP) is a way for most computers on a network to obtain configuration information from another computer (the DHCP server) on the network. DHCP is the key to today’s...