if [ "$(which qemu-ga)" == "" ]; then
   echo "guest agent is not installed"
else
   if [ ! -f /etc/qemu/qemu.conf ]; then
      qemu-ga -D > /etc/qemu/qemu.conf
      sed -i "s/block-rpcs=/block-rpcs=guest-set-user-password/" /etc/qemu/qemu.conf
      systemctl restart qemu-guest-agent
   else
      if [ "$(grep guest-set-user-password /etc/qemu/qemu.conf)" == "" ]; then
         echo "block-rpcs=guest-set-user-password" >> /etc/qemu/qemu.conf
         systemctl restart qemu-guest-agent
      fi
   fi
fi