# finally install grub
if [ -x /usr/sbin/update-grub ] ; then
UPDATEGRUB='/usr/sbin/update-grub'
- else
+ elif [ -x /sbin/update-grub ] ; then
UPDATEGRUB='/sbin/update-grub'
+ else
+ echo "Error: update-grub not available, can not execute it."
+ return 1
fi
# grub2: