Sometimes it can be useful to get access to the contents of a 
VMWare vmdk disk image without starting up the virtual 
machine. For example, getting some files on a archived VM, or 
from a backup.
On Debian/Ubuntu, you need the package libguestfs-tools
 installed.
To see what filesystems are in the .vmdk use virt-filesystems 
like this:
foo@bar:~$ virt-filesystems -a vm_0-flat.vmdk
/dev/sda1
/dev/vm-vg/root
To mount the filesystem use guestmount like this:
foo@bar:~$ guestmount -a vm_0.flat.vmdk -m /dev/vm-vg/root --ro /mnt