Book Image

Red Hat Enterprise Linux Server Cookbook

By : Jakub Gaj, Leemans
5 (1)
Book Image

Red Hat Enterprise Linux Server Cookbook

5 (1)
By: Jakub Gaj, 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 (12 chapters)
11
Index

Setting up yum to automatically update


In enterprises, automating the systematic updating of your RHEL systems is very important. You want to stay ahead of hackers or, in general, people trying to hurt you by exploiting the weaknesses in your environment.

Although I do not recommend applying this recipe to all systems in an enterprise, this is quite useful to ensure that certain systems are kept up to date as the patches and bugfixes are applied to the RPMs in Red Hat's (and other) repositories.

Getting ready

In order for this recipe to work, you'll need to be sure that the repositories you are using are set up correctly and you have valid mail setup (using Postfix or Sendmail, for example).

How to do it…

We'll set up yum to autoupdate your system once a week (at 03:00 ) and reboot if necessary through the following steps:

  1. Install the yum cron plugin, as follows:

    ~]# yum install -y yum-cron
    
  2. Then, disable the hourly and daily yum cron jobs through the following commands:

    ~]# echo > /etc/cron...