Creating Virtual Machines via CLI in ESXi 5.1

Hello,

Can someone point me to a guide to creating virtual machines using CLI tools in ESXi 5.1?  (or 5.0?)

I operate from a unix/mac workstation and I do not have a windows machine to run the full client on.   I have found a few documents but they all seem to be for older versions.

Thanks,

--jg3