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Cheat sheet

256 colors cheat sheet

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

Package Manager

Bundler cheat sheet

Cheat sheet for Bundler, the Ruby gems package manager. Essential Bundler commands to manage Ruby project dependencies efficiently.

C* Music Player

Cmus cheat sheet

Comprehensive cheat sheet for using Cmus, the console-based music player. Essential commands for navigation, playback, filtering, volume control, and playlist management.

Web Design

:nth-child cheat sheet

The nth-child cheat sheet explains how the CSS :nth-child() pseudo-class targets elements based on their order within a parent, supporting patterns, formulas, and specificity.

Web Design

CSS selectors cheat sheet

Cheat sheet for Cascading Style Sheets (CSS) selectors and combinators. Includes specificity score. Many examples of simple, compound and complex selectors.

Version Control

Git cheat sheet

Git is a version control system used for tracking changes in text files. The cheat sheet contains the most common and useful Git commands to configure and work with Git.

Command Line

Grep cheat sheet

Cheat sheet with the most common and useful Grep commands. Grep is a command-line utility for searching plain-text data sets for lines that match a regular expression.

Linux

Command Line

Grep cheat sheet

Cheat sheet with the most common and useful Grep commands. Grep is a command-line utility for searching plain-text data sets for lines that match a regular expression.

Linux Installation Guide

ThinkPad X13 Arch Linux install

Beginner friendly guide on how to install Arch Linux on a Lenovo ThinkPad X13 Gen 5 (Intel). Full process from obtaining Arch Linux to a finished installation.

Jekyll Installation Guide

Install Jekyll on Arch Linux

Jekyll on Arch Linux - Beginner friendly guide on how to install Jekyll - the static site generator - on Arch Linux using the Bash shell, RubyGems and Bundler.

Linux Scripting

Rename files based on pattern

Learn how to rename files in bulk on Linux using simple shell commands with Bash's parameter expansion. Includes examples and detailed command breakdowns.

Disaster Recovery

Shut down a frozen Linux system

Guide how to safely power off a frozen Linux system. Safe shut down methods for unresponsive systems to prevent data corruption and data loss.

System Administration

How to update Ubuntu Linux

Step-by-step process to update Ubuntu, including updating package lists, upgrading packages, performing a full upgrade if needed, and cleaning up unused files.

Linux Administration

Linux exit status codes

List of standard and custom Linux exit status codes. Numeric values returned by commands or scripts, indicating success, failure, or specific error conditions.

Scripting

Linux Scripting

Rename files based on pattern

Learn how to rename files in bulk on Linux using simple shell commands with Bash's parameter expansion. Includes examples and detailed command breakdowns.

Web Development

Introduction to JavaScript arrays

Introdution to arrays in JavaScript, covering their basic syntax, accessing elements, modifying elements, getting the length, and various array methods.

URI Validation

JS regex URL validation

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

Web Development

Introduction to JavaScript variables

Introdution to variables in JavaScript using let and const and the differences between them and var. Naming conventions, best practices, data types.

JSON Editing

jq recipes & command examples

Recipes and command examples for jq, a lightweight and flexible command-line JSON processor. Learn to delete and keep specific arrays and objects.

Linux Administration

Linux exit status codes

List of standard and custom Linux exit status codes. Numeric values returned by commands or scripts, indicating success, failure, or specific error conditions.

Template

Rsync backup script template

Simple rsync backup shell script template to back up the user home directory to mountpoint, e.g. a hard drive, thumb drive, sd card, etc. Verifies mountpoint exists, writes log to mountpoint.

Standard

Web Standards

HTML void elements

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

Internet Standards

HTTP status codes

List of all Hypertext Transfer Protocol (HTTP) response status codes, the standardized, three-digit messages from servers indicating the outcome of client requests.

ISO Standards

ISO 3166-1 country codes

List of ISO 3166-1 alpha-2 and Alpha-3 country codes, along with the corresponding country code top-level domain (ccTLD) and country phone dial code.

ISO Standards

ISO 639 language codes

Complete list of ISO 639 language names (including native names) and their corresponding ISO 639-1 Alpha-2 language codes. For use in e.g. HTML lang and hreflang attribute values.

Linux Administration

Linux exit status codes

List of standard and custom Linux exit status codes. Numeric values returned by commands or scripts, indicating success, failure, or specific error conditions.

Vim

Vim Text Editor

Delete to end of line in Vim

Learn how to delete from the current cursor position to the end of the line in Vim with a simple command. Improve your text editing in Vim today!

Vim Text Editor

Delete lines by pattern in Vim

Learn how to delete all lines matching specific patterns, covering multiple patterns, ranges, case-(in)sensitivity, and other advanced techniques with examples.

Vim Text Editor

Edit multiple files at once in Vim

How to edit multiple files in the buffer of the Vim text editor at once. Search and replace command examples to change and save multiple files at the same time.

Vim Text Editor

Vim: Delete all blank lines

This guide explains how to make Vim delete all blank / empty lines or lines containing only whitespace (tabs or spaces) for efficient text cleanup. Also applies to Gvim and Neovim.

Vim Text Editor

What is the Vim <leader> key?

The <leader> key in Vim is a customizable prefix used for user-defined shortcuts. Learn how to identify the current <leader> key, and how to customize it.

Vim Text Editor

Open multiple files in tabs at once

How to open multiple files in tabs of the Vim text editor at once. Learn to open files from within Vim and from the commandline. Recursively and non-recursively, at the same time.

Vim Text Editor

Vim cheat sheet

Vim cheat sheet and reference guide. Also includes shortcuts and commands for NERDTree and Vimium. List of essential Vim commands. Learn Vim.

Web development

Web Design

:nth-child cheat sheet

The nth-child cheat sheet explains how the CSS :nth-child() pseudo-class targets elements based on their order within a parent, supporting patterns, formulas, and specificity.

Web Design

Browse topics

“Learning from conventions will make your site better.”

Jeffrey Veen, American designer and design strategistThe Art & Science of Web Design, 2001 - IT quotes

Cheat sheet

256 colors cheat sheet

Bundler cheat sheet

Cmus cheat sheet

:nth-child cheat sheet

CSS selectors cheat sheet

Git cheat sheet

Grep cheat sheet

Linux

Grep cheat sheet

ThinkPad X13 Arch Linux install

Install Jekyll on Arch Linux

Rename files based on pattern

Shut down a frozen Linux system

How to update Ubuntu Linux

Linux exit status codes

Scripting

Rename files based on pattern

Introduction to JavaScript arrays

JS regex URL validation

Introduction to JavaScript variables

jq recipes & command examples

Linux exit status codes

Rsync backup script template

Standard

HTML void elements

HTTP status codes

ISO 3166-1 country codes

ISO 639 language codes

Linux exit status codes

Vim

Delete to end of line in Vim

Delete lines by pattern in Vim

Edit multiple files at once in Vim

Vim: Delete all blank lines

What is the Vim <leader> key?

Open multiple files in tabs at once

Vim cheat sheet

Web development

:nth-child cheat sheet

CSS selectors cheat sheet

Firefox config for web developers

Adding code blocks in markdown lists

How to add empty spaces in markdown

How to add AdSense in GTM

How to escape Liquid tags

Browse topics