UNIX for Dummies Questions & Answers

#! /usr/bin/ksh

date "+%Y %m %d %H %M" | read year month day hour minute
pattern=""
count=10
while((count)) ; do
        now="${year}-${month}-${day} ${hour}:${minute}"
        ((count=count-1))
        if ((minute)) ; then
                ((minute=minute-1))
        else
                minute=59
                if ((hour)) ; then
                        ((hour=hour-1))
                else
                        hour=23
                        datecalc -a $year $month $day - 1 | read year month day
                fi
        fi
        [[ -n $pattern ]] && pattern="${pattern}|"
        pattern="${pattern}${now}"
done
pattern=$(echo $pattern | tr "|" "\n")

grep -F "$pattern" | nl -ba | sort -nr | cut -f2-
exit 0