I think that freely available software can not only keep up with the evolution of commercial software, but often exceed what you can do commercially.

Language is one of the fundamental principles of human understanding. It is the way we interact with each other and how we grasp the world we live in. Intelligence is the ability to avoid doing work, yet getting the work done.

In science, the whole system builds on people looking at other people's results and building on top of them. In witchcraft, somebody had a small secret and guarded it - but never allowed others to really understand it and build on it. Traditional software is like witchcraft. In history, witchcraft just died out. The same will happen in software. When problems get serious enough, you can't have one person or one company guarding their secrets. You have to have everybody share in the knowledge.

I've been employed by the University of Helsinki, and that has been paying my bills. Obviously a ''real job'' pays better than most universities will pay, but I've been very happy with this arrangement I get to do whatever I want, and I have no commercial pressures whatsoever doing this.

When I do programming in my free time and for my own enjoyment, I really want to have a kind of protection: knowing that when I improve a program those improvements will continue to be available to me and others in future versions of the program.

There's a few historical reasons for why git was considered complicated. One of them is that it was complicated. The people who started using git very early on in order to work on the kernel really had to learn a very rough set of scripts to make everything work. All the effort had been on making the core technology work and very little on making it easy or obvious.

I think Leopard is a much better system [than Windows Vista] but OS X in some ways is actually worse than Windows to program for. Their file system is complete and utter crap, which is scary.