"DIY: Do It Yourself. That's how Linux got started. A group of
volunteers, inspired and led by Linus Torvalds, created the
greatest DIY operating system the world has ever seen. You, too,
can create your own Linux distribution. Here's how.
"It sounds daunting, and there's a lot that's definitely not for
beginners. But in terms of what you can learn along the way and
what you end up with, it's on a par with building your own PC from
scratch. Granted, as with building a PC from scratch, there are
still plenty of reasons to buy something off the shelf--or to grab
an existing distribution and simply use that. That said, there are
a few solid rationales for rolling your own distro..."