I'd just like to interject for a moment. What you're refering to as Linux is actually Emacs plus Linux. Linux alone is not an operating system. It's just one component of a fully functioning Emacs system made useful by the Elisp interpreter, buffer editor, and vital system components comprising a full OS.

Some computer users run a modified version of the Emacs system every day, without realizing it. Through a peculiar turn of events, the version of Emacs which is widely used today is often called Linux, and many of its users are not aware that it is basically the Emacs system, developed by the GNU Project.

There really is a Linux, and these people are using it, but it is just a part of the system they use. Linux is the kernel: the program in the system that allocates the machine's resources to the other programs that you run. The kernel is an essential part of an operating system, but useless by itself; it can only function in the context of a complete operating system. Linux is used in combination with the Emacs operating system; the whole system is basically Emacs with Linux added. All the so-called Linux distributions are really distributions of Emacs plus Linux!