Re: Guess I'll stick to 7 until 2020...
"You're probably thinking of Richard Stallman. Linus wrote a kernel."
The kernel is the operating system. The GNU project's aim was to build an open Unix - kernel and development toolkit (the C compiler, gcc etc.). GNU did have it's own kernel (Hurd), but the Linux kernel was released earlier and adopted instead, hence GNU/Linux - the Linux kernel, written using GNU tools.
So yes, Richard Stallman was involved with writing his own OS, but Linus beat him to release, admittedly using the GNU tools - so less overall work as Linus didn't have to worry about writing the compiler, linker etc.