Bing found the following results
Download Linux | Linux.org
What is Linux? - Linux.com
Linux - Wikipedia
What is Linux? - Red Hat
Linux+ (Plus) Certification | CompTIA IT Certifications
Understanding Linux - Red Hat
An Introduction to Linux Basics | DigitalOcean
Introduction to Linux – Full Course for Beginners - YouTube
Fedora Linux | The Fedora Project
Introduction to Linux | Codecademy