Of course, Linus didn‘t sit down in a vacuum and suddenly type in the Linux source code.... He had my book.... But the code was his. The proof of this is that he messed the design up.

Andrew Tanenbaum

[Linux is] terrible, everyone is using it, and they don‘t realize how bad it is. And the Linux people will just stick with it and add to it rather than stepping back and saying, ‘This is garbage and we should fix it.’

Theo de Raadt