I'd just like to interject for a moment. What you're refering 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, but please do not let this interjection distract you from the fact that in 1998, The Undertaker threw Mankind off Hell In A Cell, and plummeted 16 ft through an announcer's table.
Did you ever hear the tragedy of GNU Linux The Wise? I thought not. It’s not a story the Windows users would tell you. It’s a OSS legend. GNU Linux was a Dark Lord of the Open Source, so powerful and so wise he could use sudo to influence the midichlorians to install apps… He had such a knowledge of the dark side that he could even keep the ones he cared about from dying. The dark side of sudo is a pathway to many apps some consider to be unnatural. He became so powerful… the only thing he was afraid of was losing his niche status, which eventually, of course, he did. Unfortunately, he taught his apprentice everything he knew, then his apprentice killed him in his sleep. Ironic. He could save others from death, but not himself.
(I'm a pretender still waiting for my Linux box to arrive. I'm sure someone can do a better job of this)