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

Managing yum history


An often overlooked feature of yum is the history. It allows you to perform a load of additional features that can save your skin in an enterprise environment.

It allows you to turn back the proverbial clock to the last functioning state of an application should there be an issue with a package update, without having to worry about dependencies and so on.

How to do it…

In this recipe, I'll show you a couple of the most used yum history features.

Your yum history

Use the following command to show your yum history:

~]# yum history list

The preceding command will list the output, as follows:

Information about a yum transaction or package

Show the details of a yum transaction by executing the following command:

~]# yum history info 1

This will show you all about this single transaction:

Show the details of a package installed with yum through the following:

~]# yum history info ntp

This will show information about all the transactions that have modified the ntp package in some way...