VMware Command Line Tools
Manage virtual disks at the service console command line.
The command -X can be used to extend the size of your virtual disk. Example: You have a 5GB virtual disk and wanted to expand it to 15GB, you use the following command.
The VM need to be powered off!
vmkfstools -X 15GB /vmfs/volumes/storage/virtualmachine.vmdk
-X switch specifies the new size of the virtual disk and not how much you are extending it by.
Most used of this command is to register/un-register or power on/off/restart VMs from the console command line.