From looking at this, it looks like it's something more like 2 years (24 months), and as long as 3 years: http://en.wikipedia.org/wiki/Debian http://en.wikipedi

From looking at this, it looks like it's something more like 2 years (24 months), and as long as 3 years: http://en.wikipedia.org/wiki/Debian http://en.wikipedia.org/wiki/Debian