Currently there are at least 386 versions of linux. On October 20th 2004 (exactly 2 years ago today), Ubuntu a new version was released by South African startup Canonical. Ubuntu, pronounced /ùbúntú/ (oo-BOON-too), is a sub-Saharan African ethic or ideology focusing on people's allegiances and relations with each other.
Ubuntu, a free open-source operating system has become extremely popular with enthusiasts. One of its most popular uses has been with the desktop and not the server, as with most other linux distributions. Linux has had a hard time penetrating the desktop market for years because it hasn’t been exactly intuitive with its steep learning curve and somewhat challenging installation. Ubuntu changes all that.
I used Ubuntu desktop and to be perfectly honest, it wasn’t hard to notice its striking resemblance to Apple’s OS X. It is a very beautiful interface. That combined with the tons of open source software out there make for a potential threat to Microsoft and Apple. Ubuntu is not quite ready for the masses but you can count on it being a real thorn in the side to the more established companies.
UPDATE: DistroWatch.org the Linux version tracker ranks Ubuntu as the No. 1 Linux distribution where it has been for a little while now.