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Oracle Linux Cookbook

You're reading from Oracle Linux Cookbook Embrace Oracle Linux and master Linux Server Management

Product type Paperback

Published in Jan 2024

Publisher Packt

ISBN-13 9781803249285

Length 548 pages

Edition 1st Edition

Languages

Bash

Tools

Linux

Concepts

Operating Systems

Authors (3):

Erik Benner

Mr. Jonathan Spindel

Erik B. Thomsen

View More author details

Table of Contents (16) Chapters

Preface

1. Chapter 1: Oracle Linux 8 – Get It? Got It? Good!

2. Chapter 2: Installing with and without Automation Magic FREE CHAPTER

3. Chapter 3: Exploring the Various Boot Options and Kernels in Oracle Linux

4. Chapter 4: Creating and Managing Single-Instance Filesystems

5. Chapter 5: Software Management with DNF

6. Chapter 6: Eliminating All the SPOFs! An Exercise in Redundancy

7. Chapter 7: Oracle Linux 8 – Patching Doesn’t Have to Mean Rebooting

8. Chapter 8: DevOps Automation Tools – Terraform, Ansible, Packer, and More

9. Chapter 9: Keeping the Data Safe – Securing a System

10. Chapter 10: Revisiting Modules and AppStreams

11. Chapter 11: Lions, Tigers, and Containers – Oh My! Podman and Friends

12. Chapter 12: Navigating Ansible Waters

13. Chapter 13: Let’s All Go to the Cloud

14. Index

Why subscribe?

15. Other Books You May Enjoy

Removing the RHCK

In this recipe, you will learn how to remove RHCK and its unique package dependencies while keeping all of UEK dependencies. Remember that when installing Oracle Linux, the installer automatically installs the Oracle UEK as the default kernel, but you can install RHCK for compatibility purposes.

Getting ready

Old versions of Oracle Linux required a special tool called the kernel-transition package to manage dependencies. With new versions of Oracle Linux, a much easier process is available. For example, with Oracle Linux 8, this requirement is obsolete. All packages are purposely built to avoid any dependencies with regard to the system running on a UEK or RHCK. This makes it significantly easier to remove the UEK or RHCK from the system.

How to do it…

Let’s see how to remove RHCK from our system:

First, let’s check all kernels running within our system by using the grubby command:

Figure 3.19 – Checking the kernels

Figure 3.19...

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Authors (3)

Erik Benner

Erik Benner

Erik Benner is the VP of Enterprise Transformation and an Oracle ACE director. He is an expert strategist for customers across the United States. His customer engagements range from enterprise cloud transformations to data center consolidation and modernization. He frequently presents at conferences such as Oracle CloudWorld, ASCEND, BLUEPRINT 4D, and FOSSY. Having worked with Oracle and Sun Systems since the mid-90s, Erik is well-versed in most of the core Oracle technologies, including Oracle Cloud, Oracle Linux, and Oracle Database. When not flying to far points of the country from the Metro Atlanta area, he enjoys spending time with his family at their observatory, where the telescopes outnumber the people.

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Jonathan Spindel

Jonathan Spindel

Jonathan Spindel is a highly skilled and experienced technology leader and evangelist with a strong emphasis on Oracle ecosystems cloud infrastructure and automation. With over 23 years in the industry, he possesses a comprehensive understanding of managing, designing, and deploying multi-tenant enterprise systems and cloud solutions to address business needs and enhance operational processes. Jonathan excels in providing end-to-end management and technical turnkey cloud solutions that drive increased business productivity and reduce operational costs, ultimately delivering timely returns on investment. His hands-on approach and deep expertise in Oracle and mainstream infrastructure and cloud technologies enable him to optimize performance and streamline operations, while his proficiency in automation ensures efficient and error-free processes.

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Erik B. Thomsen

Erik B. Thomsen

Erik B. Thomsen is a Principal Sales Consultant passionate about Linux, cloud-native technologies, and “Everything as Code.” He is an innovative strategist with extensive experience working in multiple facets of IT, including DevSecOps, product management for databases and Linux, and platform engineering, where he led the development of an enterprise Kubernetes container platform. He has many years of consulting experience working for numerous Fortune 500 companies. Often described as a “visionary” or “thought leader” by his peers, Erik leverages his expertise in technology with his creative development and automation skills to help customers design, deploy, and manage cutting-edge IT solutions.

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