Book Image

Red Hat Enterprise Linux Server Cookbook

By : Jakub Gaj, William Leemans
Book Image

Red Hat Enterprise Linux Server Cookbook

By: Jakub Gaj, William Leemans

Overview of this book

Dominating the server market, the Red Hat Enterprise Linux operating system gives you the support you need to modernize your infrastructure and boost your organization’s efficiency. Combining both stability and flexibility, RHEL helps you meet the challenges of today and adapt to the demands of tomorrow. This practical Cookbook guide will help you get to grips with RHEL 7 Server and automating its installation. Designed to provide targeted assistance through hands-on recipe guidance, it will introduce you to everything you need to know about KVM guests and deploying multiple standardized RHEL systems effortlessly. Get practical reference advice that will make complex networks setups look like child’s play, and dive into in-depth coverage of configuring a RHEL system. Also including full recipe coverage of how to set up, configuring, and troubleshoot SELinux, you’ll also discover how secure your operating system, as well as how to monitor it.
Table of Contents (17 chapters)
Red Hat Enterprise Linux Server Cookbook
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Index

Configuring your DNS resolvers


DNS servers are stored in /etc/resolv.conf. You can also manage this file using NetworkManager.

As with the previous recipe, and for the same reasons, this recipe won't go into the kickstart options.

How to do it…

Let's set the DNS resolvers for eth1 to point to Google's public DNS servers: 8.8.8.8 and 8.8.4.4.

Setting your DNS resolvers using nmcli

Perform the following steps:

  1. Set the DNS servers via the following command:

    ~]# nmcli connection modify System\ eth1 ipv4.dns "8.8.8.8,8.8.4.4"
    
  2. Now, use the following command to check your configuration:

    ~]# nmcli connection show System\ eth1
    

    Here is an example output of the preceding commands:

Setting your DNS resolvers using nmtui

The nmtui tool requires a bit more work to set the DNS resolvers, as follows:

  1. Start nmtui, select the interface that you wish to modify, and click on <Edit...>:

There's more…

The nmcli tool supports adding multiple DNS servers by separating them with a semicolon. Using a blank value ("")...