November 30, 2006 – Right from its announcement, Sony always proclaimed that the PlayStation 3 would be more than a simple gaming console. It had always said the same thing about the PlayStation 2, dubbed a Computer Entertainment System by the company, though this time it’s a great deal more serious about it. At the unveiling during its E3 2005 press conference, Sony stated that it would ship Linux pre-installed on the PlayStation 3’s hard disc drive. While that (and numerous other things) changed before its release, the system does still support Linux – you just have to install it yourself
Link: IGN.com