How to find duplicate filenames (recursively) in a given directory? BASH

Question

I need to find every duplicate filenames in a given dir tree. I dont know, what dir tree user will give as a script argument, so I dont know the directory hierarchy. I tried thi

Answer 1

#!/bin/bash

file=`mktemp /tmp/duplicates.XXXXX` || { echo "Error creating tmp file"; exit 1; }
find $1 -type f |sort >  $file
awk -F/ '{print tolower($NF)}' $file |
        uniq -c|
        awk '$1>1 { sub(/^[[:space:]]+[[:digit:]]+[[:space:]]+/,""); print }'| 
        while read line;
                do grep -i "$line" $file;
        done

rm $file

And it also work with spaces in filenames. Here's a simple test (the first argument is the directory):

./duplicates.sh ./test
./test/2/INC 255286
./test/INC 255286