Comment 7 for bug 1848880

I did some more testing and found the common denominator on the machines that it's not working for me on.

It seems that this affects machines with UEFI, but not Legacy (BIOS) booting. To verify I created two identical VM's in vmware esxi 6.7u3, set one to EFI boot and the other to BIOS. The Legacy/BIOS boot VM worked normally, however the VM set to EFI boot exhibited "command not found" when attempting to run oem-config-prepare. Apart from BIOS vs UEFI, all other aspects of the VM were the same.