UNIX Commands / Manual

Hi
Does anyone know were to go (web link please?) to learn the BACIS of UNIX in OS X, I would like to know a little more about unix (for the apple) but seem to get lost in all the wen sites, and idealy find a site where i could download a manual for the unix shell in OS X.

Any ideas?

Apple has documentation.

Westwind.com - OS X command summary

Tutorial's by Norm Matloff (About UNIX - not specific to OSX)

OSXfaq - tutorials

yikes!
Is there any good books (i know there is a thread on this one BUT) about UNIX running in the Apple system ( FREEBSD i think )

sorry!
You must have edited your post at the same time i posted the above!

Many thanks for those links, They have been a GREAT help!