You might have never heard of it, but you use it every day.
Read the StoryIn 1991, a Finnish student named Linus Torvalds created a small kernal for his computer, because he was annoyed that most os's were closed source/locked down. for him unix was also too expensive, so he just done it himself. Today it powers 96% of the world's servers, every Android phone, the ISS, and all of the fastest supercomputers on earth.
of the world's top web servers run Linux. Apps like Youtube, Google, Netfilx, almost everything you use runs on linux.
the year a Finnish student, Linus Torvalds changed computers forever.
Linux will always stay open source. There are a few distros, which are like the os's that run on the linux kernal that are paid, like red hat premium and ubuntu premum/enterprise, but other than that it has been free and will forever stay free.