Instructions & Guides

Welcome

Welcome to the website of the Department of Information Technology of the University of Hard Knocks. This is where we publish short instructions & guides for our students.

We will update these pages as the courses progress.

Latest Guides

• 256 Colors - Cheat Sheet - Xterm, HEX, RGB, HSL

  List of 256 colors for Xterm prompt (console). Contains displayed color, Xterm Name, Xterm Number, HEX, RGB and HSL codes.

• Abbreviations used in Web development

  Cheat sheet: List of acronyms, abbreviations, numeronyms, initialisms, and contractions used in web design, web development, DevOps and related areas.

• Bundler Cheat Sheet

  Cheat sheet for Bundler, the Ruby gems package manager.

• CSS Selectors Cheat Sheet

  Cheat sheet for Cascading Style Sheets (CSS) selectors: Quick reference guide for CSS selectors.

• Convert SVG files from RGB to CMYK

  How to convert SVG files with RGB color profiles to CMYK with the help of Inkscape and Scribus.

• Custom domain email alias with mailbox.org

  How to add a custom domain email alias, including SPF, DMARC and DKIM to an existing mailbox.org email account. Simple step-by-step instruction.

• GNU Sed recipes and command examples

  Recipes and command examples for GNU sed (stream editor).

• Git Cheat Sheet

  Git version control cheat sheet with the most common and useful Git commands.

• Grep Cheat Sheet

  Grep cheat sheet with the most common and useful Grep commands.

• HTML Void Elements

  The concept of void elements in HTML and how they differ from self-closing tags in XML, XHTML, and SVG, highlighting the syntax and parsing differences.

• How to add AdSense Code in Google Tag Manager

  Step by step instructions for implementing Google AdSense Code into a Google Tag Manager (GTM) container and fire it on page view.

• ISO 3166-2 – Country codes

  ISO 3166 – Country codes. ISO 3166 Alpha-2 and country code top-level domain (ccTLD).

• ISO 639 Language names and codes

  ISO 639-2 language names and their corresponding ISO 639-1 language codes.

• JavaScript RegExp URL slug validation

  JavaScript RegExp examples to validate URI paths, also known as URL slugs. Code examples to match lowercase characters, hyphens and numbers.

• Netlify: Delete form submissions (GDPR)

  How to set up Netlify forms to be GDPR conformant by automatically deleting form submissions after processing. Netlify functions to delete form submissions.

• Netlify: Loading fonts from Git-LFS

  How to enable Netlify to load fonts from Git Large File Storage (LFS). Fixes downloadable font: rejected by sanitizer error.

• Pacman Cheat Sheet

  Cheat sheet for pacman, the Arch Linux package manager. List of common and essential commands and options. Also includes cheats for paccache.

• Pandoc Cheat Sheet

  Pandoc (universal document converter) cheat sheet with useful Pandoc commands.

• Robots.txt template - whitelist

  Sophisticated robots.txt template. Keep unwanted robots out (disallow). White lists (allow) legitimate user-agents. Useful for most websites. Robots.txt example.

• Vim Cheat Sheet

  This Vim Cheat Sheet also includes shortcuts and commands for NERDTree and Vimium. List of essential Vim commands. Learn Vim.

• Vim: Edit multiple files in tabs at the same time

  How to edit multiple files in the buffer of the Vim text editor, following a certain search and replace (substitution) pattern, at the same time.

• Vim: Open multiple files in tabs at the same time

  How to open multiple files in tabs of the Vim text editor, following a certain pattern, recursively and non-recursively, at the same time.

• jq JSON processor recipes & command examples

  Recipes and command examples for jq, a lightweight and flexible command-line JSON processor.

• tmux Cheat Sheet

  Cheat sheet for the open-source terminal multiplexer tmux. Getting started with tmux. Learn to master tmux with simple commands and shortcuts.