>>>> Linux is not unix.
>>
>
>Now this is something I've never heard before. Certainly if I boot to a shell or open a shell window I can type unix commands and it works as expected.
>
>Would you care to elaborate on the above statement?

Really? That is a common phrase in the linux community. In fact, the acronym Gnu is a recursive acronym that stands for Gnu's Not Unix. You've heard of Debian, right? Well, Debian is Gnu Linux (the original distribution). You can also go to some linux prompts and type "dir", but you wouldn't say that Linux is Windows (or the other way around) would ya? =)
Sure, basic C programs that compile and run on Linux also run on Unix, but I'll bet that those same programs would run under Windows as well. Linux isn't Unix because it has it's own kernel, its own set of standards, its own application library (some have been adopted from and to Unix), its own version of the SysV init process. It's jsut different. =)
In a way (don't think of features) it's like comparing Win9x and WinNT. Some of the stuff is the same, but underneath it is all different.