sample.txt

I'd just like to interject for a moment.  What you're referring to as
Linux, is in fact, GNU/Linux, or as I've recently taken to calling it,
GNU plus Linux.  Linux is not an operating system unto itself, but
rather another free component of a fully functioning GNU system made
useful by the GNU corelibs, shell utilities and vital system components
comprising a full OS as defined by POSIX.

Many computer users run a modified version of the GNU system every day,
without realizing it.  Through a peculiar turn of events, the version of
GNU which is widely used today is often called "Linux", and many of its
users are not aware that it is basically the GNU 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 normally used in combination with the GNU
operating system: the whole system is basically GNU with Linux added, or
GNU/Linux.  All the so-called "Linux" distributions are really
distributions of GNU/Linux.