Red Hat Linux Born on Halloween and Still Scaring the Pants off Proprietary Operating Systems
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.