A 21-year-old student released 10,239 lines of computer code for free, letting anyone modify it. Today, that code runs 3 billion Android phones, most websites, and every supercomputer on Earth.
This is Linus Torvalds and Linux! 🐧
1991 A 21-year-old Finnish student wanted to buy a UNIX system. He couldn't afford it. So he built his own. From scratch.
He posted it online with the now-famous words: 
"Just a hobby, won't be big and professional."
He wanted to call it "Freax" (free + freak + x). His friend thought that was a terrible name and secretly called the folder "Linux" on the FTP server. It stuck.
In 2000, Steve Jobs personally offered him a job at Apple. Condition: stop working on Linux.
He refused...
When BitKeeper stopped being free, he didn't complain. He just built Git in two weeks. You know, the tool that basically runs all of software development now.
He was named after two people: Linus Pauling (Nobel Prize chemist) and Linus from Peanuts. Half genius, half blanket-carrying cartoon character. His own words.
Today his "hobby" runs:
→ Every single one of the top 500 supercomputers
→ 3+ billion Android phones
→ Most of the internet
→ The majority of the cloud
Never underestimate a student who can't afford software. 💪