Storage_Unit=`du -h /var/spool/cron/root|awk '{print $1}'|sed -e "s/^.*\(.\)$/\1/"`
If [ $Storage_Unit = "G" ]
then
Size=`du -h /var/spool/cron/root|awk '{print $1}'|sed 's/.\{1\}$//'`
for Size_rounded_number in $(printf %.0f $Size); do
ROUNDED_Size=$Size_rounded_number
done
if [ $ROUNDED_Size -gt "10" ]      #setting a threshold of say 10G
cp /dev/null /var/spool/mail/root
else
echo "Size in $ROUNDED_Size
fi
else
echo "storage unit in $Storage_Unit"
fi