Book Image

CentOS 7 Linux Server Cookbook - Second Edition

By : Jonathan Hobson
Book Image

CentOS 7 Linux Server Cookbook - Second Edition

By: Jonathan Hobson

Overview of this book

This book will provide you with a comprehensive series of starting points that will give you direct access to the inner workings of the latest CentOS version 7 and help you trim the learning curve to master your server. You will begin with the installation and basic configuration of CentOS 7, followed by learning how to manage your system, services and software packages. You will then gain an understanding of how to administer the file system, secure access to your server and configure various resource sharing services such as file, printer and DHCP servers across your network. Further on, we cover advanced topics such as FTP services, building your own DNS server, running database servers, and providing mail and web services. Finally, you will get a deep understanding of SELinux and you will learn how to work with Docker operating-system virtualization and how to monitor your IT infrastructure with Nagios. By the end of this book, you will have a fair understanding of all the aspects of configuring, implementing and administering CentOS 7 Linux server and how to put it in control.
Table of Contents (22 chapters)
CentOS 7 Linux Server Cookbook Second Edition
Credits
About the Authors
About the Reviewer
www.PacktPub.com
Preface
Index

Priming the kernel


The Linux kernel is a program that constitutes the central core of the operating system. It can directly access the underlying hardware and make it available to the user to work with it using the shell.

In this recipe, we will learn how to prime the kernel by working with dynamically loaded kernel modules. Kernel modules are device driver files (or filesystem driver files) that add support for specific pieces of hardware so that we can access them.

You will not work very often with kernel modules as a system administrator, but having a basic understanding of them can be beneficial if you have a device driver problem or an unsupported piece of hardware.

Getting ready

To complete this recipe, you will require a minimal installation of the CentOS 7 operating system with root privileges.

How to do it...

  1. To begin, log in to your system using your root user account, and type the following command in order to show the status of all Linux kernel modules currently loaded:

    lsmod
    
  2. In the...