While WordPress makes it easy for non-coders to manage a website, there will probably come a time when you want to edit code in WordPress to get a little more control over how your site looks or functions. Here are some beginner’s guides on how to edit HTML and CSS code, etc.
Beginner’s Guide for WordPress
How to Edit HTML in WordPress Code Editor (Beginner’s Guide)
How to Easily Add Custom CSS to Your WordPress Site
How to Customize Your WordPress Theme (Beginner’s Guide)
HTML5 / CSS3
User Interface Design (UI) & User Experience (UX) Design
The Difference Between UX and UI Design
JavaScript
PHP (Hypertext Preprocessor)
Bootstrap
Bootstrap 4 Beginner’s Tutorial
MySQL
MySQL Cheat Sheet — Structured Query Language Guide
MSSQL
SQL Server Management Studio Download
Apache Velocity
How to Generate Code with Apache Velocity
Cascade CMS Knowledge Base
WordPress
WordPress Documentation
NMSU WordPress
My NMSU WordPress Site
Drupal
Drupal Documentation
MIT Drupal Resources
Drupal Tutorial (Step-By-Step)
Unix / Linux
Unix/Linux Tutorial for Beginners
Linux Commands Cheat Sheet
Linux
Linux Sys Admin Handbook (PDF)
Using the vi Text Editor