Book Image

CentOS 7 Server Deployment Cookbook

By : Timothy Boronczyk, IRAKLI NADAREISHVILI
Book Image

CentOS 7 Server Deployment Cookbook

By: Timothy Boronczyk, IRAKLI NADAREISHVILI

Overview of this book

CentOS is derived from Red Hat Enterprise Linux (RHEL) sources and is widely used as a Linux server. This book will help you to better configure and manage Linux servers in varying scenarios and business requirements. Starting with installing CentOS, this book will walk you through the networking aspects of CentOS. You will then learn how to manage users and their permissions, software installs, disks, filesystems, and so on. You’ll then see how to secure connection to remotely access a desktop and work with databases. Toward the end, you will find out how to manage DNS, e-mails, web servers, and more. You will also learn to detect threats by monitoring network intrusion. Finally, the book will cover virtualization techniques that will help you make the most of CentOS.
Table of Contents (18 chapters)
CentOS 7 Server Deployment Cookbook
Credits
About the Author
About the Reviewer
www.PacktPub.com
Preface

Prioritizing repositories using the Priorities plugin


Although package managers make installing and updating software an almost trivial task, there can still be some pain points if we're not careful. For example, we can configure multiple repositories, including third-party repositories not maintained by CentOS, and the version of a package in one repository can conflict with the same in another. This recipe uses the Priorities plugin to prioritize the repositories we use to help avoid such pitfalls.

Getting ready

This recipe requires a CentOS system with a working network connection. Administrative privileges are also required, either by logging in with the root account or through the use of sudo.

How to do it...

Follow these steps to prioritize which repositories yum downloads software from:

  1. Open the /etc/yum.conf file with your text editor. Locate the plugins option and verify that its value is set to 1 to enable plugin support. Update the value if necessary:

    plugins = 1
    
  2. Install the yum-plugin...