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

Troubleshooting background services


Often, a big part of every system administrator's work is troubleshooting the server when something goes wrong. This is especially true for your system's services, as they are constantly running and processing information all the time. Services can be dependent on other services and on the server's system, and there will be situations in your administrator's life where the system services will fail or refuse to start. Here, in this recipe, we will show you how to troubleshoot them if something goes wrong.

Getting ready

To complete this recipe, you will require a working installation of the CentOS 7 operating system with root privileges and a console-based text editor of your choice; you should also have completed the Knowing and managing your background services recipe from this chapter, where we installed the Apache web server.

How to do it...

In order to show you how to troubleshoot services, we will introduce a random error in the Apache service's configuration...