Reference library

Cheatsheets

Reference cheatsheets for Git, Docker, Regex, Markdown, HTTP, Kubernetes, and developer workflows.

Git Commands Cheatsheet Common Git commands for checking status, reviewing diffs, and creating focused commits. Docker Commands Cheatsheet Useful Docker commands for images, containers, logs, and cleanup. Regex Cheatsheet Quick regex syntax reminders for matching text, groups, anchors, and character classes. Markdown Cheatsheet Markdown syntax for headings, links, code blocks, lists, and tables. jq and JSONPath Cheatsheet Quick selectors and filters for JSON inspection workflows. Bash Commands Cheatsheet Common shell patterns for files, pipes, variables, and scripts. Nginx Cheatsheet Nginx server block, proxy, redirect, and cache snippets. Kubernetes Cheatsheet kubectl commands for pods, services, logs, rollout, and context checks. HTTP Status Codes Cheatsheet Common HTTP status codes grouped by success, redirect, client error, and server error. tmux Cheatsheet tmux session, window, and pane commands for terminal workflows. Vim Cheatsheet Core Vim movement, editing, search, and save commands. CSS Selectors Cheatsheet CSS selectors for classes, IDs, attributes, descendants, and states. CIDR and Subnet Cheatsheet Quick CIDR, subnet mask, host count, and IP range reminders for network planning. JWT and HMAC Cheatsheet Compact JWT, HMAC, hash, checksum, and token reminders for development fixtures. URL and Query String Cheatsheet URL anatomy, query string, UTM, encoding, and request snippet reminders for web workflows. Date and Time Conversion Cheatsheet Timestamp, ISO date, timezone, duration, and calendar reminders for browser-local time workflows. XML Workflow Cheatsheet XML linting, XPath, XSLT, and JSON conversion reminders for local XML snippets. Data Validation Cheatsheet Phone, Luhn, IBAN, VAT, GTIN, and ISO country validation reminders for pasted data. QR and Barcode Payload Cheatsheet QR contact, WiFi, barcode, and GTIN payload reminders for local sharing workflows. Game Randomizer Cheatsheet Dice, coin, card, and lightweight randomizer reminders for tabletop and classroom use. Measurement Conversion Cheatsheet Distance, disk capacity, SI prefix, angle, pressure, and everyday unit conversion reminders. Everyday Math Cheatsheet Percentage, BMI, speed, distance, storage, and quick calculator reminders. Forensic Triage Cheatsheet Browser-local IOC, hash, email header, defang, Safe Links, and log timeline reminders. Physics Formulas Cheatsheet Quick, non-certified formulas for units, pressure, force, circuits, waves, and motion. Development Snippets Cheatsheet Regex, cron, Base64, SQL, YAML, slug, color, and CSS helper reminders for daily development.