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: C. William (Bill) Pollard is currently Chairman of Fairwyn Investment Company, a private investment firm. For over a twenty-five year period, from 1977 to 2002, Bill participated in the leadership of The ServiceMaster Company and served not once but twice as its Chief Executive Officer.