Destroy all running VirtualBox VMs

kill-all-vms.sh

# Runs perfectly on CentOS 7

# Read all pids for "VBoxHeadless" process, and kill (-9) them.
while read -r pid; do
  echo "Killing VirtualBox Process '${pid}'..."
  kill -9 ${pid}
  echo "  OK Done."
done <  <(pgrep VBoxHeadless)

# Read all VirtualBox VMs, and unregister, then delete them
while read -r name; do
  echo "Unregistering VM '$(echo $name |awk '{print$2}' |sed -e 's/.*{\([^}]\+\)}.*/\1/g')'..."
  VBoxManage unregistervm "$(echo $name |awk '{print$2}' |sed -e 's/.*{\([^}]\+\)}.*/\1/g')" --delete &> /dev/null
done < <(VBoxManage list vms)