Linux isn't one OS, but many "distributions" (like Ubuntu, Fedora, or Mint). It is open-source and highly customizable.
To help me narrow down the for your needs: Which Operating System is For You?
Completely free, very secure, no forced tracking, and uses very few system resources. Linux isn't one OS, but many "distributions" (like
(e.g., budget-friendly, mid-range, or "money is no object") Linux isn't one OS