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

Installing and configuring a caching-only nameserver


Every network communication between computers can only be made through the use of unique IP addresses to identify the exact endpoints of the communication. For the human brain, numbers are always harder to remember and work with than assigning names to things. Therefore, IT pioneers started in the early 70s to invent systems for translating names to physical network addresses using files and later simple databases. In modern computer networks and on the Internet, the relationship between the name of a computer and an IP address is defined in the Domain Name System (DNS) database. It is a worldwide distributed system and provides domain name to IP address resolution and also the reverse, that is IP address to domain name resolution. DNS is a big subject, and it is the purpose of this recipe to provide the perfect starting point by showing you how to install and setup your own caching-only and forwarding nameserver. Here we will use Unbound...