Update VSphere 5 ESXI

Download the update from here:
http://www.vmware.com/patchmgr/findPatch.portal

Drop the zip file into a datastore. Then, run the following from the shell (Alt-F1 on the host)

esxcli software vib install -d /vmfs/volumes/[DATASTORE]/[PATCH_FILE].zip

The datastore does seem to be case sensitive (Or I just misspelled it the first time)