Originally Posted by John VV
Linux is NOT the operating system it is the hardware/software kernel
linux is the bit of code that sits between the OPERATING SYSTEM and the hardware
Sorry, that I have to correct you and go a bit off topic, but Linux IS the operating system. The operating system IS the "bit of code" that sits between the hardware and the user space.
What you mean is the Linux distribution. OpenSUSE, Fedora, Gentoo, Arch Linux etc. are the distributions, not the operating systems. Linux distributions are just collections of software put together and around the Linux kernel, so that the user can easily install the "operating system" and get a computer up and running easily with all of the user applications like web browsers, e-mail clients, office suites etc. This includes different package managers.
See also: https://en.wikipedia.org/wiki/Operating_system
Even if this article isn't completely correct, too, since in the strict sense the operating system is not GNU/Linux, but Linux. GNU is "just" a set of essential user space tools without which the operating system (Linux) wouldn't be very usable. So in a not so strict sense you could call GNU/Linux an operating system, too, to honour the importance and the work of GNU.
is totally wrong in this respect. In this article the term "operating system" is used in its colloquial, not in its technical term.