case "$1" in
purge|remove|upgrade|failed-upgrade|abort-install|abort-upgrade|disappear)
- echo "Updating grub.cfg to make sure there are no non-existing entries being left."
- update-grub
+ if test -e /boot/grub/grub.cfg && which update-grub >/dev/null 2>&1; then
+ echo "Updating grub.cfg to make sure there are no non-existing entries being left."
+ update-grub
+ fi
;;
*)