UNIX for Dummies Questions & Answers

C=1
OLD=""
while read IP U
do
        if [ "$IP $U" = "$OLD" ]
        then
                C=`expr $C + 1`
        else
                C=1
        fi

        if [ "$C" -ge 10 ]
        do
                echo "user $U has done this 10 times in a row" | sendmail
                C=1
        done

        OLD="$IP $U"
done < filename

# cat /tmp/yourinputfile|uniq -c|awk '{ if($1 >= 10) print $2}'

for i in `command`
do
grep $i /tmp/yourinputfile
done

outputfromcommand|xargs  -I {} grep '{}' /tmp/yourinputfile

 command > /tmp/$$

while read LINE
do
        ...
done < /tmp/$$

rm -f /tmp/$$

uniq -c /tmp/yourinputfile|awk '{ if($1 >= 10) print $2}'|while read line
do
grep -i $line /tmp/yourinputfile
done