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Technical Guides

24 hands-on guides written from real work — crypto safety, DNS and domains, Linux, IoT hardware, mining and content growth. Machine-readable too: agents can search and buy these over x402.

AI & Agents

• Building Your Own Web Crawler & Indexer

  How to build a web crawler and search index: a from-scratch Python approach (requests + BeautifulSoup, deque/set queue management, robots.tx

• Using Tesseract OCR with Python — Install & Code

  Using the Tesseract OCR engine from Python: installing pytesseract/OpenCV and Tesseract itself, extracting text from an image file (grayscal

Content & Growth

• How to Grow a YouTube Channel — Full Guide

  YouTube growth fundamentals from a 900k-subscriber channel: how the algorithm favors CTR and watch time together, the two metrics that matte

Crypto Basics

• How to Tell if a Cryptocurrency Is Legit

  A structured due-diligence checklist for judging whether a crypto project is legitimate: what to verify in the white paper, team, GitHub act

• Installing the Duino-Coin Repo on Linux Desktop

  Setting up Duino-Coin mining on a Linux desktop: installing Python and image-library dependencies via apt, cloning the official revoxhere/du

• Repurposing an Old GPU for Crypto Mining

  Getting an old GPU mining: checking profitability against electricity cost on whattomine.com, updating drivers, choosing NVIDIA mining softw

• Setting Up Chia Farming with a Raspberry Pi

  How to run a Chia farmer on a Raspberry Pi 4: why Chia's Proof of Space and Time lets a low-power Pi farm (while plotting stays on a stronge

IoT & Hardware

• ESP32-CAM Module: Features & Programming Guide

  A features-and-programming guide to the ESP32-CAM: onboard camera (OV2640/OV7670), microSD, flash LED and WiFi/BLE; how to flash it without

• Getting Started with the ESP32 Microcontroller

  An orientation to the ESP32 for developers coming from Arduino: why its 240 MHz dual-core CPU and built-in WiFi/BLE matter, how to set up th

• Hard Drive Diagnosis: Can a 3.5-Inch Drive Run on PoE?

  Why a 3.5-inch HDD can't be powered directly over PoE — the +12V/+5V and 6–10W spin-up requirements versus PoE's 48V/15.4W (or PoE+ 25.5W) b

• Mastering LoRaWAN for IoT Projects

  An overview of LoRaWAN for IoT: the architecture (end nodes, gateways, network server handling de-dup/ADR, application server), the power-vs

• Understanding Extra PCB Soldering Pads

  What the unlabeled extra solder pads on a PCB are for: test points for probing signals, in-circuit programming interfaces (UART/SWD/JTAG), J

Linux & Systems

• Converting eBook Formats on Linux (epub, mobi, pdf)

  Converting ebooks between formats on Linux for Kindle: the Kindle-supported formats, using command-line ebook-convert (from ebook-tools) for

• Reviving a Western Digital Hard Drive on Linux

  A Linux recovery workflow for a failing 2.5-inch WD drive: reading SMART health with smartctl (watching reallocated/pending sectors), zero-f

On-chain & DeFi

• How Flash Loans & Smart Contracts Can Be Profitable

  Legitimate profit mechanisms in DeFi: how flash loans provide uncollateralized capital that must be borrowed and repaid within one block (re

Security & OpSec

• Google Dorking Search Shortcuts Reference

  A reference for Google dorking / advanced search operators used in OSINT and security auditing: core operators (site, filetype/ext, inurl, i

Web & Domains

• Adding a CNAME Record to Your Domain

  Step-by-step instructions for adding a CNAME record at a domain registrar (GoDaddy, Namecheap, etc.) to verify domain ownership for services

• CNAME Domain Parking & DNS Resource Records

  An explainer of DNS resource records: the four fields (host, type, TTL, data) every record uses, what the A, AAAA, CNAME, and MX record type

• Customizing Your Google Workspace Web Address

  How to create short branded addresses for Google Workspace services: setting a CNAME so Gmail lives at mail.example.com, mapping a custom do

• Forwarding Your Google Domain to a URL or IP

  How to forward a Google-managed domain to another URL or IP: the Google Domains forwarding steps, choosing permanent (301) vs temporary (302

• Mapping a New URL in Google Sites

  How an admin maps a custom URL to a new Google Site: the requirements (new Sites only, public sharing, subdomain-to-primary-domain rule, 2,0

• Setting Up the Naked Domain for Your Google Site

  Step-by-step setup of a naked (bare) domain redirect for a Google Site: configuring the redirect in the Google Admin console, adding A recor

• Troubleshooting CNAME Records

  How to verify and debug a CNAME record: looking it up with nslookup or dig/MXToolbox, and resolving the common failures — unpropagated chang

• What To Do If You Can't Add a Domain on Google

  Resolving Google Workspace's 'domain already used as an alias or domain' error: the removal cooldown windows (up to 24h, or 7 days via a res