So to do this in ESXi, see this tutorial: http://kb.vmware.com/selfservice/microsites/search.do?cmd=displayKC&docType=kc&externalId=1014165

I found out that the commands from ESX are completely different, so if you are receiving the "vmware-cmd" not recognized, you are probably running ESXi and need to use the commands from the KB article above.