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> Do you know where I can find a web site referencing all the Unix
> commands?
This is one of those "how many angels can dance on the head of a pin"
questions, but ....
Depending on what you want to do (which will make a HUGE difference),
you might try the UNIX Guru Universe at http://www.ugu.com/sui/ugu/show?ugu
It's a good starting point for the novice, but also has a lot
of information for the more advanced user.
That said, depending on what you're trying to accomplish, there
are probably more focused or appropriate resources as well.
What _ARE_ you trying to do?
(Shameless plug: Deborah and I wrote the UNIX Visual Quickstart Guide,
which has been really well received--5 of 5 stars average rating
at Amazon. See http://www.amazon.com/exec/obidos/ASIN/0201353954
for details.)