Systems Administration

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.

Stop treating PostgreSQL like slightly broken MySQL and start using it the way it was designed.

Your old computers can run your house. Building it is a hands-on way to learn to work with an AI.

Build your TCP/IP foundation through clear diagrams of layers, addressing, routing, transport, and end-to-end network communication.

Understand DNS through clear visual explanations of name resolution, zones, records, caching, security, and practical operations.

Learn Microsoft Intune through visual explanations of enrollment, device configuration, applications, compliance, and endpoint operations.

This book is not just a Python course with a networking flavour or a networking course with a few scripts attached. You already know how routing converges, why VLANs leak, and what a half-open TCP session looks like on the wire. What this book adds is the ability to transform that knowledge into code that runs across hundreds of devices, reports accurately on its findings and never makes changes that cannot be undone.

What if a 125B-parameter AI model could run locally on a gaming GPU with just 12 GB of VRAM? Strata makes it possible. This book takes you inside the techniques that make it work, from MoE sparsity and memory tiers to PCIe pipelining and speculative decoding, then shows you how to install, tune and troubleshoot it yourself.

Mastering Keepalived is a practical guide to building reliable, highly available infrastructure with VRRP, failover and health checking. Learn how to design, configure, troubleshoot and secure Keepalived in real production environments, from core networking concepts to advanced HA architectures and day-to-day operations.

Inference engineering is now its own discipline, with unique challenges around speed, cost, reliability and scale. This practical guide takes you from core concepts to production systems, showing how modern inference architectures work, how to optimize them and how to make better engineering decisions through measurement and trade-off analysis.

Self-hosting from home sounds simple until CGNAT, changing IPv6 prefixes and double NAT get in the way. This book shows you how to build Linux infrastructure that actually works on the real Internet, with practical architectures, working configurations and troubleshooting techniques that help you understand what is really happening to your packets.

Go beyond the basics of Tor and learn how to build private, resilient services on the dark web. From onion routing and v3 onion services to real-world threats and secure deployment, this book gives you the technical knowledge and practical skills to host privacy-critical services without exposing where they live.

Build Linux from the ground up and see what really happens under the hood. From firmware and bootloader to kernel, libc, init, networking and security, this book strips the system down to its essentials while explaining why every piece exists, what depends on it and how far you can push minimalism.

A practical guide for IT support staff to identify, test and resolve technical problems without guessing their way into the next incident.

A practical look at how the modern Internet edge really works. Explore DNS, BGP, TLS, HTTP/3 and the architecture behind content delivery, then apply that knowledge to building, securing and optimizing Cloudflare in production. No marketing fluff, just the engineering behind the edge.