Leanpub Header

Skip to main content
Go to Leanpub.com

Ubuntu 26.04 LTS Resolute Raccoon: The Complete Guide

Everything you need to know about Canonical's latest long-term support release.

Ubuntu 26.04 LTS Resolute Raccoon: The Complete Guide
This book is 100% completeLast updated on 2026-07-30
Steve Publications

Whether you're upgrading, deploying, or simply exploring Ubuntu 26.04 LTS, this book is your essential guide to Canonical's most ambitious long-term support release. From installation and desktop features to security, performance, and enterprise deployment, it provides clear, practical coverage of everything you need to get the most from Ubuntu.

Minimum price

$19.00

$29.00

You pay

Author earns

$

Also available for 1 book credit with a Reader Membership

PDF
EPUB
WEB
APP
152
Pages
About

About

About the Book

This book is a complete reference for Ubuntu 26.04 LTS, codenamed Resolute Raccoon. Released on April 23, 2026, this is the eleventh long-term support release in Ubuntu's history and one of the most technically ambitious yet. It brings GNOME 50 with a Wayland-only desktop session, Linux kernel 7.0, Rust-based core utilities and sudo, systemd 259 with mandatory cgroup v2, TPM-backed full-disk encryption, post-quantum cryptography defaults in OpenSSH and OpenSSL, and native NVIDIA CUDA and AMD ROCm support. It is designed for five years of standard support (through April 2031) and up to ten years with Ubuntu Pro.

Share this book

Categories

Operating System DevelopmentSystems Administration

Feedback

Contact the author

Author

About the Author

Steve Publications

Steve is a technology professional with over 20 years of experience in software development, server infrastructure, cybersecurity, vulnerability research and reverse engineering. He specializes in analyzing complex systems, identifying weaknesses and improving security.

Beyond his professional work, Steve collaborates with researchers and industry experts to create practical technical books covering software development, cybersecurity, cloud computing, DevOps, AI and enterprise technologies. His goal is to help IT professionals, students and enthusiasts develop practical skills through clear explanations, real-world examples and hands-on exercises.

At Steve Publications, we use AI to assist with translation, proofreading and editing but not to replace the research, technical expertise or hands-on experience behind our books. Some authors publish under pseudonyms for privacy or professional reasons.

Every book is written, reviewed and maintained by experienced professionals, supported by a private community of over 420 engineers and researchers. We prioritize technical accuracy, practical value and regularly updated content over mass-produced AI-generated text.

We welcome experienced professionals interested in writing or reviewing books, especially in specialized and emerging technology fields. If you'd like to contribute, contact us with your area of expertise.

We stand behind our work. If a book doesn't meet your expectations, Leanpub offers a 60-day money-back guarantee.

Contents

Table of Contents

Introduction: Why Ubuntu 26.04 Matters

Chapter 1: What Is Ubuntu 26.04 LTS?

  1. Ubuntu’s History and Philosophy
  2. What Does LTS Mean?
  3. The Resolute Raccoon Story
  4. Key Themes of This Release
  5. How to Read This Book
  6. Chapter Summary

Chapter 2: System Requirements and Installation

  1. Hardware Minimums and Recommended Specs
  2. Downloading ISOs and Verifying Checksums
  3. Creating Bootable Media
  4. The Subiquity Installer Walkthrough
  5. Dual-Boot Scenarios with BitLocker Windows
  6. Server Installation (Minimal, Virtual Machine Guest, Cloud-Init)
  7. Cloud Images: AWS, Azure, GCP, Oracle Cloud, IBM Cloud
  8. Post-Install Setup
  9. Chapter Summary

Chapter 3: First Boot and Desktop Experience

  1. Initial Setup Wizard and Ubuntu Pro Enrollment
  2. GNOME 50 Desktop Overview
  3. The Yaru Theme Updates
  4. New Default Applications
  5. Wayland Session and XWayland Compatibility
  6. Accessibility Features
  7. Snap Permissions Prompting and Security Center
  8. Configuring Your Desktop
  9. Chapter Summary

Chapter 4: Command-Line Fundamentals

  1. The Shell: Bash and Ptyxis
  2. Essential Commands
  3. The File System Hierarchy
  4. Permissions and Ownership
  5. Package Management with APT 3
  6. Rust-Based Core Utilities (uutils)
  7. sudo-rs: Memory-Safe Privilege Escalation
  8. Text Processing and Pipes
  9. Shell Scripting Basics
  10. Chapter Summary

Chapter 5: System Administration Essentials

  1. User and Group Management
  2. systemd 259: Services, Units, and cgroup v2
  3. Logging and Log Analysis
  4. Cron and Scheduled Tasks
  5. Network Configuration with Netplan 1.2
  6. Chrony NTP
  7. Storage Management
  8. System Monitoring and Sysprof
  9. Chapter Summary

Chapter 6: Security Hardening

  1. Ubuntu’s Security Model Overview
  2. TPM-Backed Full-Disk Encryption (TPM/FDE)
  3. AppArmor Mandatory Access Control
  4. Firewall Configuration: nftables and UFW
  5. SSH Hardening with OpenSSH 10.2
  6. Security Updates and Livepatch
  7. Compliance: CIS Benchmarks, HIPAA, SOC 2
  8. Chapter Summary

Chapter 7: Networking and Services

  1. Network Stack Fundamentals
  2. DNS with systemd-resolved
  3. DHCP Server Configuration
  4. Web Servers: Nginx and Apache HTTPD
  5. Mail Infrastructure: Postfix and Dovecot
  6. File Sharing: Samba 4.23
  7. Proxy and Caching: Squid 7.2
  8. Load Balancing with HAProxy 3.2
  9. Chapter Summary

Chapter 8: Virtualization and Containers

  1. QEMU/KVM Virtualization Fundamentals
  2. libvirt and virsh Management
  3. LXC/LXD Containers
  4. Docker and containerd (Dual-Track Updates)
  5. Podman and toolbox/distrobox
  6. Confidential Computing: Intel TDX and AMD SEV-SNP
  7. Chapter Summary

Chapter 9: Cloud Infrastructure

  1. Cloud-Init: The Backbone of Cloud Instances
  2. Ubuntu Images Across Cloud Platforms
  3. Ubuntu Pro for Cloud Subscriptions
  4. Multi-Cloud Management and Portability
  5. Infrastructure as Code: Terraform and Pulumi
  6. Cost Optimization Strategies
  7. Auto-Scaling with Kubernetes on Cloud
  8. Chapter Summary

Chapter 10: Development Workflow

  1. Language Toolchains
  2. Python 3.14
  3. Rust Development
  4. Go 1.25
  5. Node.js and JavaScript Tooling
  6. Java/OpenJDK 25
  7. AI/ML: NVIDIA CUDA, AMD ROCm, Intel DPC++/SYCL
  8. IDEs and Code Editors
  9. Git Workflows and Code Review
  10. Chapter Summary

Chapter 11: Troubleshooting and Diagnostics

  1. The Troubleshooting Mindset
  2. Boot Process and Initramfs (Dracut)
  3. Kernel Crash Dumps (kdump)
  4. Journalctl and Log Analysis
  5. Network Debugging
  6. Filesystem Repair and fsck
  7. Recovery: Live USB, Chroot, and Rescue Mode
  8. Chapter Summary

Chapter 12: Performance Tuning and Optimization

  1. Understanding System Performance Bottlenecks
  2. CPU Scheduling and Low-Latency Kernels
  3. Memory Management and Swap Tuning
  4. Disk I/O Optimization
  5. Network Performance Tuning with sysctl
  6. systemd Performance Optimization
  7. amd64v3 Architecture Variants
  8. Profile-Guided Optimization with Sysprof
  9. Chapter Summary

Chapter 13: Customization and Flavors

  1. GNOME Customization
  2. Alternative Desktop Environments
  3. Building Custom Ubuntu Images
  4. Ubuntu Core and Immutable Systems
  5. Official Flavors Overview
  6. Enterprise Customization with Landscape
  7. Chapter Summary

Chapter 14: Enterprise Deployment and Management

  1. Ubuntu Pro: ESM, FIPS, Livepatch, Compliance
  2. Canonical Livepatch for Zero-Downtime Kernel Patches
  3. Landscape: Fleet Management and Monitoring
  4. Cloud Authentication with authd (Google IAM, Entra ID, OIDC)
  5. Active Directory Integration with ADSys
  6. Patch Management and Compliance Automation
  7. Security Incident Response and Forensics
  8. Chapter Summary

Conclusion: The Road Ahead

References

Get the free sample chapters

Click the buttons to get the free sample in PDF or EPUB, or read the sample online here

Download Sample PDFDownload Sample EPUB

The Leanpub 60 Day 100% Happiness Guarantee

Within 60 days of purchase you can get a 100% refund on any Leanpub purchase, in two clicks.

See full terms...

Earn $8 on a $10 Purchase, and $16 on a $20 Purchase

We pay 80% royalties on purchases of $7.99 or more, and 80% royalties minus a 50 cent flat fee on purchases between $0.99 and $7.98. You earn $8 on a $10 sale, and $16 on a $20 sale. So, if we sell 5000 non-refunded copies of your book for $20, you'll earn $80,000.

(Yes, some authors have already earned much more than that on Leanpub.)

Learn more about writing on Leanpub

Free Updates. DRM Free.

If you buy a Leanpub book, you get free updates for as long as the author updates the book! Many authors use Leanpub to publish their books in-progress, while they are writing them. All readers get free updates, regardless of when they bought the book or how much they paid (including free).

Most Leanpub books are available in PDF (for computers) and EPUB (for phones, tablets and Kindle). The formats that a book includes are shown at the top right corner of this page.

Finally, Leanpub books don't have any DRM copy-protection nonsense, so you can easily read them on any supported device.

Learn more about Leanpub's ebook formats and where to read them

Write and Publish on Leanpub

You can use Leanpub to easily write, publish and sell in-progress and completed ebooks and online courses!

Leanpub is a powerful platform for serious authors, combining a simple, elegant writing and publishing workflow with a store focused on selling in-progress ebooks.

Leanpub is a magical typewriter for authors: just write in plain text, and to publish your ebook, just click a button. (Or, if you are producing your ebook your own way, you can even upload your own PDF and/or EPUB files and then publish with one click!) It really is that easy.

Learn more about writing on Leanpub