The article provides a detailed guide on how to install and use the Gatsby.js framework on Ubuntu Linux. Gatsby.js is a fast, secure, React-based, open-source framework used for building robust apps and websites while integrating various content, APIs, and services. It also supports building headless CMS with templates for platforms like WordPress, Shopify, and Drupal. The installation process involves setting up Node.js, the Gatsby command line interface, and creating a Gatsby app.