> You probably mean it's not a GNU operating system. He more likely means you don't manage it as a linux system. A lot of linux systems don't use GNU, especia

> You probably mean it's not a GNU operating system. He more likely means you don't manage it as a linux system. A lot of linux systems don't use GNU, especially embedded ones, or containers. Busybox is very common. But you don't really treat these systems any differently from GNU/linux other than some relatively mundane command differences.