Text Processing:
AWK cheat sheet
AWK cheat sheet with essential commands, syntax, variables, and examples for text processing and data extraction. Quick reference guide for using AWK.
Scripting
Collection of publications tagged with scripting.
Bash Script:
Digitally frame photos with PhotoFramer
Learn how to use PhotoFramer, a Bash script that adds EXIF information, location, and camera settings as a frame to your photos without modifying originals.
Searching:
GNU find cheat sheet
GNU find command cheat sheet: Search files by name, type, size, time, permissions, and more. Includes examples for deletion, batch actions, and output formatting.
Shell Scripting:
How to add comments in Bash scripts
Learn how to add single-line, multi-line, and inline comments in Bash scripts, including the role of the shebang (#!) and how it is not considered a comment.
Sending HTTP POST Requests:
How to make POST requests using cURL
Learn how to create HTTP POST requests with cURL using flags like --data, --form, and --request. Includes examples for JSON, XML, CSV, stdin, and multipart uploads.
Extracting HTTP Status Codes:
How to output HTTP status code using cURL
Learn how to make cURL output only the numerical HTTP status code using two command-line methods, with detailed explanations of all options and dependencies.
Linux Scripting:
How to rename files based on pattern in Linux
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 Arrays in JavaScript
Introdution to arrays in JavaScript, covering their basic syntax, accessing elements, modifying elements, getting the length, and various array methods.
JavaScript Data Types:
Introduction to JavaScript booleans
Learn about JavaScript booleans, how they work, coercion rules, and how different values behave in boolean contexts. Many examples and explanations included.
URI Validation:
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.
Web Development:
Introduction to variables in JavaScript
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 JSON processor 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:
List of 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.
Linux Scripting:
Script to convert TTF/OTF fonts to WOFF2
Learn how to convert TrueType Font (TTF) and OpenType Font (OTF) files to Web Open Font Format 2 (WOFF2) using a simple shell script. Create your own web fonts.
Text Manipulation:
Sed (Stream Editor) cheat sheet
GNU sed cheat sheet covering everything from basic syntax to advanced addressing techniques. Learn how to use sed efficiently to manipulate text with examples.
Text Manipulation:
GNU sed recipes and command examples
Recipes and command examples for GNU sed (stream editor), the non-interactive command-line text editor.
Static analysis for shell scripts:
ShellCheck – Shell script checker
Learn how to use ShellCheck to analyze and improve your shell scripts by identifying syntax, semantic, and portability issues before they cause runtime errors.
Regular Expressions:
Validating IPv4 and IPv6 addresses with regexp
Learn how to validate IPv4 and IPv6 addresses using regular expressions (regexp). Includes patterns, examples for valid and invalid formats, and combined matching rules.
Random Quote
“Make errors impossible. Making it impossible for the user to make errors is the best way to eliminate error messages.”
