Guide
26 resources in this category. Machine-readable: /categories/Guide.json returns the whole collection as one JSON array.
Setting up Duino-Coin mining on a Linux desktop: installing Python and
Setting up Duino-Coin mining on a Linux desktop: installing Python and image-library dependencies via apt, cloning the official revoxhere/duino-coin repo, installing its Python requirements, and where to configure a wallet — with notes on CPU, AVR/Arduino, and ESP8266/ESP32 mining.
Getting an old GPU mining: checking profitability against electricity
Getting an old GPU mining: checking profitability against electricity cost on whattomine.com, updating drivers, choosing NVIDIA mining software (T-Rex, GMiner, NBMiner), creating a wallet and joining a pool, configuring the miner, and undervolt/overclock tuning while keeping the GPU under 85°C.
How to run a Chia farmer on a Raspberry Pi 4: why Chia's Proof of Spac
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 stronger machine), installing the software, creating a wallet, optimizing the Pi, pointing the farmer at plot directories, and monitoring with 'chia farm summary'.
Legitimate profit mechanisms in DeFi: how flash loans provide uncollat
Legitimate profit mechanisms in DeFi: how flash loans provide uncollateralized capital that must be borrowed and repaid within one block (reverting otherwise), with uses in DEX arbitrage, collateral swaps, and liquidations; plus lending, liquidity provision, and yield farming — framed with a risk disclaimer.
A reference for Google dorking / advanced search operators used in OSI
A reference for Google dorking / advanced search operators used in OSINT and security auditing: core operators (site, filetype/ext, inurl, intitle, intext, cache, related, link), combination operators (allinurl, allintitle, AROUND, exclusion, date ranges), and practical queries for finding exposed files.
An explainer of DNS resource records: the four fields (host, type, TTL
An explainer of DNS resource records: the four fields (host, type, TTL, data) every record uses, what the A, AAAA, CNAME, and MX record types do, and how multiple MX records with priority values provide email failover — including the trailing-dot FQDN gotcha.
How to create short branded addresses for Google Workspace services: s
How to create short branded addresses for Google Workspace services: setting a CNAME so Gmail lives at mail.example.com, mapping a custom domain to a Google Site, and enabling the naked (bare) domain via A records and an Admin console redirect.
How to forward a Google-managed domain to another URL or IP: the Googl
How to forward a Google-managed domain to another URL or IP: the Google Domains forwarding steps, choosing permanent (301) vs temporary (302) redirects and path forwarding, verifying propagation, and locating the synthetic DNS record that powers (and can break) forwarding.
How an admin maps a custom URL to a new Google Site: the requirements
How an admin maps a custom URL to a new Google Site: the requirements (new Sites only, public sharing, subdomain-to-primary-domain rule, 2,000-address limit), the Admin console steps, and CNAME verification — with auto-provisioned domain-validated SSL.
Step-by-step setup of a naked (bare) domain redirect for a 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 records at your registrar that point to Google's IPs, and the constraints (only primary domains can be redirect targets; up to 48h propagation).
How to verify and debug a CNAME record: looking it up with nslookup or
How to verify and debug a CNAME record: looking it up with nslookup or dig/MXToolbox, and resolving the common failures — unpropagated changes, mistyped Label/Target values, trailing-dot errors, and the A-vs-CNAME conflict on the same hostname.
Resolving Google Workspace's 'domain already used as an alias or domai
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 reseller) and how to reclaim a domain linked to an unmanaged account via Google's domain reclaim / ownership-verification form.
Converting ebooks between formats on Linux for Kindle: the Kindle-supp
Converting ebooks between formats on Linux for Kindle: the Kindle-supported formats, using command-line ebook-convert (from ebook-tools) for ePub→MOBI/RTF and PDF→MOBI conversions, and using Calibre's GUI for batch conversions across a wider format range.
A Linux recovery workflow for a failing 2
A Linux recovery workflow for a failing 2.5-inch WD drive: reading SMART health with smartctl (watching reallocated/pending sectors), zero-filling with dd to force sector reallocation, repairing with fsck, repartitioning in GParted, and last-resort sector imaging with ddrescue/HDDSuperClone.
A features-and-programming guide to the ESP32-CAM: onboard camera (OV2
A features-and-programming guide to the ESP32-CAM: onboard camera (OV2640/OV7670), microSD, flash LED and WiFi/BLE; how to flash it without a USB port using an FTDI adapter and the GPIO0-to-GND flash-mode trick; and running Espressif's CameraWebServer sketch for a browser live feed.
An orientation to the ESP32 for developers coming from Arduino: why it
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 the Arduino IDE or ESP-IDF toolchain, and the critical 3.3V-logic, FreeRTOS dual-core, and OTA-update differences to understand before wiring one up.
Why a 3
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) budget — and the workable alternatives: PoE splitters for low-draw drives, PoE NAS units, or moving to 2.5-inch drives/SSDs.
An overview of LoRaWAN for IoT: the architecture (end nodes, gateways,
An overview of LoRaWAN for IoT: the architecture (end nodes, gateways, network server handling de-dup/ADR, application server), the power-vs-latency tradeoffs of Class A/B/C devices, typical 2–15 km range, and real-world uses in agriculture, smart cities, asset tracking, and industry.
What the unlabeled extra solder pads on a PCB are for: test points for
What the unlabeled extra solder pads on a PCB are for: test points for probing signals, in-circuit programming interfaces (UART/SWD/JTAG), JTAG boundary-scan testing, component replacement/rework and design-variant population, and access points for factory calibration.
How to build a web crawler and search index: a from-scratch Python app
How to build a web crawler and search index: a from-scratch Python approach (requests + BeautifulSoup, deque/set queue management, robots.txt and scope control) or frameworks (Scrapy, Crawlee, Colly), then indexing crawled fields into Elasticsearch, Meilisearch, or SQLite FTS5 for full-text search.
Using the Tesseract OCR engine from Python: installing pytesseract/Ope
Using the Tesseract OCR engine from Python: installing pytesseract/OpenCV and Tesseract itself, extracting text from an image file (grayscale + image_to_string), a live webcam OCR loop with thresholding, and the preprocessing (thresholding, denoising, deskewing) that improves real-world accuracy.
YouTube growth fundamentals from a 900k-subscriber channel: how the al
YouTube growth fundamentals from a 900k-subscriber channel: how the algorithm favors CTR and watch time together, the two metrics that matter (4–10%+ CTR and average view duration), thumbnail/title curiosity formulas with A/B testing, and content tactics — strong hooks, consistent cadence, and fast comment engagement.
How to query a Solana SPL token mint’s authority fields directly via t
How to query a Solana SPL token mint’s authority fields directly via the getAccountInfo RPC method with jsonParsed encoding — the exact request shape, how to read mintAuthority and freezeAuthority from the response, why third-party scanners can lag or misreport this, and how to extend the same check to Token-2022 mints.
The common mechanisms behind honeypot token contracts — sell-path reve
The common mechanisms behind honeypot token contracts — sell-path reverts, disguised extreme sell taxes, allowlist-gated transfers, and blacklist functions added post-launch — plus how a simulated-sell check works and why source-code review alone misses most of them.