Linux for GNU/Linux is not correct?

Hi
I've been reading <advanced programming in the UNIX environment> 2nd edition and had a problem of understanding the following words:

Code:

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For example, Linux is the kernel used by the GNU operating system. Some people refer to
 this as the GNU/Linux operating system, but it is more commonly referred to as simply
Linux. Although this usage may not be correct in a strict sense, it is understandable,
given the dual meaning of the phrase operating system. (It also has the advantage of
being more succinct.)

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I just don't understand why calling 'Linux' for the GNU/Linux operating system is not correct. This section also told me at the very beginning:

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In a strict sense, an operating system can be defined as the software that controls the
hardware resources of the computer and provides an environment under which programs
can run. Generally, we call this software the kernel

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That is to say, in a strict sense an operating system is the kernel. So if Linux is the kernel used by the GNU operating system, why simply 'Linux' is not correct in a strict sense?

Thanks in advance!

Maybe the two "strict sense"s are not the same "strict sense".

I think Cyberfish is right:
There is the kernel - which is the "proper operating system". But just like the engine in a car, it doesn't do that much good on it's own. In the car case, you also need a gearbox, a chassis, three or four wheels, several body panels, at least one door, some seats, and many other things to make a usable vehicle. A Linux Distribution (which is how I would call the DVD or downloadable package) is a "car". The kernel is the engine. That is about 1-3MB of binary code. The rest of the DVD content (or downloaded content) is the body panels, gearbox, etc, etc, to make something that is usable.

Just like the "Windows Operating System" consists of a kernel (which is a few megabytes), and a lot of drivers, applications and services. These all work together. The ACTUAL OS is small, but the whole system is large.

Most of the "OS" that is disitributed to a user is not the kernel - it is stuff that tell the kernel to perform some task, such as read a command from a shell-prompt and execute that command, or a Web-servier that receives requests for pages, and send back the HTML code to display something in your web-browser. Very little of what a web-server does is happening in the kernel - a little bit happens there: the kernel reads the HTML or PHP content from the filesystem, and sends small portions out on the network port. But a large portion is the web-server doing whatever it has to do (asking to read a file, interpreting PHP code, looping around asking to send a small chunk of HTML out on the network until all the content has been sent).

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Mats

And activists such as Richard Stallman want you to call it GNU/Linux. As it gives the proper credit. Which is well justified, but RMS is a fat troll, so that's one reason NOT to call it GNU/Linux.

Considering that the Linux kernel would have very little additional functionality if you remove code produced by GNU, I would tend to agree with Mr Stallman. He is certainly a character ... Troll, I'm not so sure.

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Mats

"the engine in a car", pretty explanation. According to the context, I think cyberfish is rigt. Thank matsp and zacs7, making me more clearer conceptually.

Quote:

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Originally Posted by password636

That is to say, in a strict sense an operating system is the kernel. So if Linux is the kernel used by the GNU operating system, why simply 'Linux' is not correct in a strict sense?

Thanks in advance!

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Imagine you had a system with a Linux kernel and nothing else. Not much of an "operating system" is it?

That said, I think the debate is kind of silly. GNU Hurd is still nowhere near completion and probably will never reach that point. Without the Linux kernel, the GNU suite would not really be of much use. GNU needs Linux as much as Linux needs GNU. GNU/Linux is certainly a proper thing to call it. The problem is... I don't really care.

Quote:

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Originally Posted by zacs7

And activists such as Richard Stallman want you to call it GNU/Linux. As it gives the proper credit. Which is well justified, but RMS is a fat troll, so that's one reason NOT to call it GNU/Linux.

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RMS is an ideological maniac with not a single whit of pragmatism in his soul...

He's also a genius and a major contributor. I can't bring myself to disrespect the author of Emacs, a tool I rely on every day.

Why GNU/Linux? - GNU Project - Free Software Foundation (FSF) by rms