From the host machine: $> VBoxManage clonehd “source.vmdk” “cloned.vdi” –format vdi $> VBoxManage modifyhd “cloned.vdi” –resize 51200 $> VBoxManage clonehd “cloned.vdi” “resized.vmdk” –format vmdk From within the machine: $> resize2fs -p -F sda1