https://www.debian.org/releases/buster/amd64/ch01s02.en.html
*** 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. *** 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! -- WBR, vitich@gmail dot com
