NOT AN OPERATING SYSTEM!!!!!!!!
Linux is a KERNEL, NOT AN OPERATING SYSTEM started by Linus Torvalds in 1991 at University of Helsinki in Finland. Linux was at first just a hobby for Linus. Linux is free software.
It just so happened that just when Linux was getting usable, GNU had everything it needed except a kernel. Thus, people started using Linux with GNU to make a completely free UNIX-like operating system called GNU/Linux.
Today Linux and GNU/Linux have come a long way from the early 1990's, although they're still mostly used by geeks.
Linux is at version 2.6.xx as of mid 2005.
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