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  1. What is Linux? - Linux.com

  2. system(3) — Linux manual page - man7.org

  3. Linux - Wikipedia

  4. What is Linux? - Red Hat

  5. What is Linux? {Understanding Linux Operating System}

  6. Understanding Linux - Red Hat

  7. What is Linux? - Opensource.com

  8. Introduction to Linux - Codecademy

  9. What Is Linux? A Guide for Non-technical Users

  10. What is Linux? Everything You Need to Know - SoftwareLab

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