Book Image

Mastering CentOS 7 Linux Server

By : Mohamed Alibi, BHASKARJYOTI ROY
Book Image

Mastering CentOS 7 Linux Server

By: Mohamed Alibi, BHASKARJYOTI ROY

Overview of this book

Most server infrastructures are equipped with at least one Linux server that provides many essential services, both for a user's demands and for the infrastructure itself. Setting up a sustainable Linux server is one of the most demanding tasks for a system administrator to perform. However, learning multiple, new technologies to meet all of their needs is time-consuming. CentOS 7 is the brand new version of the CentOS Linux system under the RPM (Red Hat) family. It is one of the most widely-used operating systems, being the choice of many organizations across the world. With the help of this book, you will explore the best practices and administration tools of CentOS 7 Linux server along with implementing some of the most common Linux services. We start by explaining the initial steps you need to carry out after installing CentOS 7 by briefly explaining the concepts related to users, groups, and right management, along with some basic system security measures. Next, you will be introduced to the most commonly used services and shown in detail how to implement and deploy them so they can be used by internal or external users. Soon enough, you will be shown how to monitor the server. We will then move on to master the virtualization and cloud computing techniques. Finally, the book wraps up by explaining configuration management and some security tweaks. All these topics and more are covered in this comprehensive guide, which briefly demonstrates the latest changes to all of the services and tools with the recent shift from CentOS 6 to CentOS 7.
Table of Contents (16 chapters)
Mastering CentOS 7 Linux Server
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Preface
Index

Paravirtualization


Paravirtualization is a new kind of enhancement to the virtualization technology. It has the capacity of making the guest OS recompile before being installed on the vertical machine that serves the virtual machines to identify between virtual and physical hardware. With the use of this virtualization, we have a better optimization in system performance via conserving computing resources. It is due to this technology that we don't need to dedicate resources for the virtual machines and will be used only as necessary. Differing from the full virtualization where we need to create the virtual resources and dedicate them to the virtual machine, it is rather being used or not.

In paravirtualization, the guest operating system is managed by the hypervisor—as a layer lying between the physical machine and the virtual machines—to efficiently enable and share physical device access. While it normally doesn't require full device emulation or dynamic recompiling to perform privileged...