Book Image

Oracle Linux Cookbook

By : Erik Benner, Erik B. Thomsen, Jonathan Spindel
Book Image

Oracle Linux Cookbook

By: Erik Benner, Erik B. Thomsen, Jonathan Spindel

Overview of this book

Discover the power of Oracle Linux 8, the free and enterprise-grade Linux distribution designed for use in any environment, with this recipe-style book. Starting with instructions on how to obtain Oracle Linux for both X86 and ARM-based platforms, this book walks you through various installation methods, from running it as a Windows service to installing it on a Raspberry Pi. It unravels advanced topics such as system upgrades using Leapp for major version transitions and using a PXE server and kickstart files for more advanced installations. The book then delves into swapping kernels to take advantage of Oracle’s UEK, exploring boot options, managing software with DNF, and achieving high availability. Detailed recipes involving security topics will assist with tasks such as data encryption, both at rest and in motion. For developers, it offers guidance on building RPM files, using Docker and Podman in a containerized environment, working with AppStreams, and more. For large-scale deployments, the book introduces Oracle Linux Automation Manager for enterprise-level Ansible utilization, from setting up the Ansible server to basic playbook writing. Finally, you’ll discover strategies for cloud migration. By the end of this book, you’ll possess a comprehensive toolkit that will elevate your skills as a Linux administrator.
Table of Contents (16 chapters)

Playing with logical volume management

When it comes to filesystems, one of the biggest issues is their inflexibility when it comes to storage. Creating a volume on a disk means the space is locked in for the volume, which also locks in the size of the filesystem. However, Logical Volume Manager (LVM) provides a solution to this problem. LVM is a widely used tool in the field of computer storage management that acts as a layer of abstraction between physical storage devices, such as hard drives or SSDs, and the OS. This enables the flexible and efficient management of storage resources. LVM is especially valuable for Linux systems, as it offers a flexible and scalable storage management solution.

With LVM, administrators can dynamically allocate and resize storage volumes without the need to repartition disks or disrupt the system. This flexibility is particularly useful in environments where storage requirements change frequently or where efficient resource allocation is needed...