I need to compare 2 diff type of files and find out the duplicate after comparing each types of files:

Type 1 file name is like: file1.abc
(the extension abc could any 3 characters but I can narrow it down or hardcode for 10/15 combinations).

The other file is file1.bcd01abc (the extension bcd is constant, 2 digit (00 to 04) and last three character could be any 3 letters (I can narrow that last 3 charcaters to 10-15 combinations).

whenever the script finds a duplicate after coparing these two types of files, the output will indicate "duplicate found in file1.abc and and file1.bcd01abc and the value is xxxx".


Both of file format:
172.10.10.19<TAB>rou020i00sfg<TAB>descriptions

Thanks and this is not a homwork.

This finds duplicates

find_dup()
{
awk ' FILENAME=="file1" { arr[$0]++ }
        FILENAME=="file2" { if (arr[$0] { print "value is", $0} }
      ' file1 file2
}

#/bin/ksh
while read file2 
do
   while read file1 
   do
        ln -s file1 $file1
        ln -s file2 $file2
        result=$( find_dup )
        if [[ ! -z $result ]] ; then
           echo "duplicate found in $file1 and $file2 $result"
        fi
   done  < dirfile1
done < dirfile2  > result.log

How do I differentiate file name extensions.
see both file nane starts with file1, but the extensions are diff.
file1.xxx
file1.bcd00xxx

so while read should I put file1.*
and then second file file1.bcd*

also I am getting error:

[13]: dirfile2: cannot open

Thanks