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

Setting up NRPE on remote client hosts


The Nagios Remote Plugin Executor (NRPE) is a system daemon that uses a special client-server protocol and should be installed on all client hosts that you want to monitor via your Nagios server remotely. It allows the central Nagios server to trigger any Nagios checks on these client hosts securely and with low overhead. Here, we will show you how to set up and configure any CentOS 7 client to use NRPE; if you've got more than one computer in your network that you want to monitor, you need to apply this recipe for every instance.

Getting ready

To complete this recipe, you will require a computer other than your Nagios server with an installation of the CentOS 7 operating system and root privileges, which you want to monitor, and which needs a console-based text editor of your choice installed on it, along with a connection to the Internet in order to facilitate the download of additional packages. This computer needs to have access to our Nagios server...