virtualbox script

#!/bin/bash
  for i in `vboxmanage list vms | sed "s/\"\(.*\)\".*/\1/"`
  do
   declare -a vmki=("$i")
   for vm in ${vmki[@]}
  do
  echo -n "starting...." $vm
  echo ""
  sleep 1
  VBoxManage startvm $i --type headless
  done
done

this script will take list all of existing virtualbox insences and start it.