I scratch-built a minimal linux distro that had NE2000 support and ipchains. It fit on a single bootable floppy. Through high school, I sold the discs for $100

I scratch-built a minimal linux distro that had NE2000 support and ipchains. It fit on a single bootable floppy. Through high school, I sold the discs for $100 each, with the promise that it'd take whatever old junk computer you had kicking around and turn it into a reliable router. Paid for my first computer that way!