Here's a quote from a part of the interview:
http://edition.cnn.com/2006/BUSINESS/05 ... storvalds/Linus Torvalds wrote:I didn't start thinking I want to give out the source code. What I started doing, already at that point I was 21, I was at Helsinki University and for half my life I'd been doing programming. All the projects I'd ever done had been projects for my own enjoyment -- technical challenges, but also to just solve issues that I had. And Linux really was nothing different from that. So open source was not really a conscious decision of "I want to make this open source." To a large degree open source was just a way to allow others to look at this and say, "Hey, this is what I've done -- I'm proud of this."