# and update to the latest security
chroot ${LXC_ROOTFS} apt-get update
-chroot ${LXC_ROOTFS} apt-get upgrade
+chroot ${LXC_ROOTFS} apt-get -y upgrade
# if we're all good here, unmount things and clean up
[ -e ${LXC_ROOTFS}/usr/sbin/policy-rc.d ] && rm ${LXC_ROOTFS}/usr/sbin/policy-rc.d