https://www.debian.org/releases/buster/amd64/ch01s02.en.html
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1.2. What is GNU/Linux?
Linux is an operating system: a series of programs that let you interact with your computer and run other programs.
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You are trying to explain what GNU/Linux is and in the first sentence you say that Linux is an operating system. But this is not true!
It would be correct to start like this:
Linux is the kernel of the GNU/Linux operating system.
Thanks!
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