Short bio: Computer Scientist, FOSS supporter (read more)
Tux Machines (TM)-specific
In October of 1994, on All Hallow's Eve, Marc Ewing released the first publicly available distribution of Red Hat Linux. It's a release that has become known as the Halloween release.
Back in 1994, Linux was a scary beast. It was a nascent effort that was just getting going, full of complexity and loaded with promise. I think in 1994 that Linux scared a few users, but I doubt it really scared the big proprietary vendors.