Short bio: Computer Scientist, FOSS supporter (read more)
Tux Machines (TM)-specific
Mark Shuttleworth is famous for two things: for being the first African in space, and for founding Canonical, the company behind Ubuntu Linux.
→ I know it't not really Ubuntu Linux. It's Ubuntu, a computing platform based on GNU/Linux and including lots more besides. But we shall call it "Ubuntu Linux" as a sort of handy abbreviation.
Ubuntu was arguably the first Linux distro to attract the attention of ungeeks, to provide an installer that tended to "just work" without any jargon, and to gain a foothold of any sort amongst the type of user that would otherwise perfectly happily have paid for Windows or OS X.
As a result, it spawned a range of online forums dedicated to supporting and nurturing its large fan base, handily collated into the Ubuntu Forums portal.