script for scanning two files

[bhandu]

I have developed a shell script which will scan two files and then put the similar records in a third file.The script is follows


rm $filename3
touch $filename3

exec < $filename1

while read line
do
exec <filename2
while read line1
do
if [ $line -eq $line1 ]
echo $line >> filename3
end if
done
done

But the above shell script is not working.
Could anyone help me out?

[Cabhan]

Don't dual-post. I already answered this in Linux Newbie.