Systems Administration

Master OpenTofu from the ground up with practical examples, proven patterns and expert guidance for real-world infrastructure. Whether you are migrating from Terraform or starting fresh, this book helps you build reliable, secure and maintainable cloud and on-premises environments with confidence.

Build, secure and run reliable mail servers with confidence. This practical guide walks you through Postfix and Dovecot from the ground up, covering everything from core email protocols to high availability, performance tuning and automation. Packed with real configurations and clear explanations you can use in production.

Stop letting Windows decide how you work. This guide takes you from everyday tasks to the tools and techniques professionals rely on, covering PowerShell, WSL2, security, automation and AI. Packed with practical examples, it helps you unlock the full potential of Windows 11 with confidence.

Discover how eBPF is changing Linux systems engineering. Starting with the fundamentals, this book walks you through building, debugging and deploying real eBPF programs for observability, networking, security and performance. Learn practical techniques you can use with confidence in production across modern Linux environments.

If you know Linux, you already have most of the skills you need to master FreeBSD. This practical guide shows where the systems differ, why those differences matter and how to deploy, secure and manage FreeBSD with confidence using comparisons that make every concept easy to understand.

Memory is at the heart of Linux performance. This book explains how the kernel manages it from virtual memory and page allocation to NUMA, cgroups and real-world optimization. Learn through clear explanations, kernel source examples and practical exercises you can run yourself.

Modern software delivery demands more than fast pipelines. It requires systems built for reliability, security and scale. This book shows how to design and run CI/CD as a production platform, with practical patterns, real world examples and proven strategies that help teams deliver software with confidence.

Cloud, Kubernetes, AI, security and automation have changed what DevOps really means. This book cuts through the hype with practical guidance for building reliable, scalable platforms using proven patterns, real production lessons and modern engineering practices that help teams move faster without sacrificing stability.

Software teams are building faster than ever, but scaling engineering takes more than great code. This book shows how to create developer platforms that simplify delivery, support cloud-native systems and prepare organizations for the demands of AI. Practical, technical and grounded in real-world experience.

Big migrations rarely fail because of code alone. The Migration Architect’s Handbook shows how to untangle dependencies, design the right repository strategy and move complex systems forward without bringing the organization to a halt. Built on real-world lessons, it turns daunting modernization efforts into practical, manageable work.

Whether you're deploying your first reverse proxy or managing high traffic production infrastructure, this book gives you the practical knowledge to use NGINX with confidence. Learn not just what each feature does but why it matters, how to avoid common mistakes and how to build fast, secure, reliable systems that scale.

Whether you're learning PowerShell or managing enterprise environments, this book is a practical reference for Windows PowerShell 5.1 and PowerShell 7+. It covers core concepts, scripting, automation and administration with clear examples based on official Microsoft documentation.

The Linux Virtual Filesystem is the abstraction that unifies every filesystem in Linux behind a single interface. This book explores its architecture, kernel implementation, and modern applications, giving system administrators, developers, and kernel engineers the knowledge to understand, troubleshoot, and extend the VFS.

> 3:07 a.m. The pager goes off. Your database is down, the disk is full, and you're the on-call engineer holding the line. Open this manual to the playbook you need right now to diagnose, stabilize, and verify the fix -- fast.

Learn Linux with a practical, step-by-step guide that takes you from beginner to advanced user. Build real skills through hands-on examples and gain the confidence to use Linux in professional and everyday environments.