@Linux_Is_Best I disagree. There were #opensource operating systems like #bsd before #linux under a permissive license. Companies like #apple took their work and made #macos without giving back.
#linux is gaining mainstream attention because the linux kernel uses the #gpl2 license. Any derivative works of the Linux kernel should be open source. The #gnu toolchain like compiler, bash, command line tools etc are parts of your Linux distribution.
So GNU made the world take open source seriously.