Linux is not in the public domain. Linux is a cancer that attaches itself in an intellectual property sense to everything it touches. That's the way that the license works.
Bio: Constance Hale is an American writer and critic based in San Francisco. Her journalism has appeared in metropolitan newspapers and national magazines, but she is best known for her books on language: Sin and Syntax, "Vex, Hex, Smash, Smooch, " and Wired Style.