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Learn the C/C++ foundations actually used in Arduino and ESP32 projects: compilation, memory, hardware I/O, timing, state machines, and safe debugging.
A comprehensive guide to Firefly III — what it is, how to install it, key financial concepts, daily workflows, automation with rules, importing data, and getting the most out of your self-hosted finance manager.
A practical Git guide for tracking changes, using branches, reviewing diffs, recovering from mistakes, and publishing reliable work to GitHub.
A comprehensive, practical guide to JSON — syntax, data types, nesting, real-world examples, tools, and best practices. Everything you need to confidently work with JSON in n8n, APIs, Home Assistant, and beyond.
A comprehensive guide to n8n — what it is, how it compares to alternatives, deployment options, hosting, key concepts, AI agent workflows, and learning resources. Everything you need to go from zero to running production automations.
A command-first Python guide for building reliable scripts, API integrations, file tools, and automations on Linux.
A practical shell reference for navigating projects, managing environments, inspecting logs and processes, using HTTP/JSON tools, and diagnosing failures.
A practical map of software development: how programs are structured, how to choose tools, design features, debug failures, test safely, and ship useful software.
A practical SQL reference for reading, joining, aggregating, changing, and safely designing relational data.
Build clear, accessible web interfaces with the three native browser languages—ideal for KB pages, dashboards, forms, and small tools.
A safe, practical YAML reference for Home Assistant, Docker Compose, CI workflows, and other configuration-driven projects.
A comprehensive guide covering everything from sales vocabulary and methodologies to cold calling, cold emailing, lead generation, objection handling, closing, and metrics — built to take you from zero to highly effective in B2B sales.
A practical learning system for prompting AI image generators to create professional visual assets for websites and social media — with visual examples, prompt templates, and a complete vocabulary reference.
A practical beginner summary and learning roadmap for Kubernetes. Covers core concepts, kubectl basics, local setup with kind/k3s, first workload deployment, common pitfalls, and a day-1 operations checklist.
Commonly used and useful Linux commands, highly rated tools, best practices, and security awareness for Debian-based distros like Ubuntu and Linux Mint. Includes practical guidance on shared network storage options such as NFS, Samba, SSHFS, and Nextcloud.
A scannable, practical one-page checklist for daily Linux administration tasks on Debian-based systems.
A structured, hands-on mini-course for brushing up on Linux administration. Covers shell fundamentals, system management, networking, storage, security, and automation for Debian-based distros like Ubuntu and Linux Mint.
Practical setup, VLAN segmentation, security, monitoring, and maintenance guidance for a home lab running a UniFi UCG Fiber gateway.
Step-by-step deployment and authentication checklist for publishing this knowledge base to Cloudflare Pages.
A practical beginner-friendly guide to Docker, containers, images, volumes, networks, Compose, backups, and everyday self-hosting commands.
Set up speech-to-speech voice chat with Hermes Agent on Telegram, CLI push-to-talk, and Discord voice channels — all with free providers.
The working plan for kb.costabile.com.au: architecture, content model, authentication, deployment, and future improvements.