On September 17, 1991, twenty-one-year-old Finnish student Linus Torvalds uploaded a 72-kilobyte compressed file containing the Linux 0.01 source code to the FUNET FTP server. Accompanied by modest expectations—Torvalds famously framed it as a mere hobby that wouldn't become "big and professional"—this primitive UNIX-like kernel lacked floppy drivers and could barely run a bash shell. Yet, by unleashing it into the nascent decentralized wilderness of the internet, Torvalds sparked an open-source revolution. Today, that fragile student experiment quietly underpins nearly the entire digital universe: from Android devices and hyperscale cloud infrastructure to orbital spacecraft and the world's fastest supercomputers. Version 0.01 proved that distributed, transparent peer production could out-innovate proprietary monoliths, cementing collaborative software as the bedrock of modern civilization.