In vmware you may find the the virtual NIC dissapears, this is a known issue, here is how to resolve the VM nic issue..Virtual Network card on VMWARE guest disappears
You can power off your virtual machines from command line. Here is a step by step guide on how to do this.
VMotion fails at 80% with a general system error,A general system error occurred: Failed to write checkpoint data (offset 33558328, size 16384): Limit exceeded
Virtual Center Service will not start,bare metal virtualization, the virtual centre service does not start automatically..How to fix the Virtual Center Service will not start problem
Error parsing the server “(servername)” “clients.xml” file,The type initializer for VirtualInfrastructure.Utils.HttpWebRequestProxy’ threw an exception.how to fix your vi client when it will not login to vmware