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/sh
dirname=/path/to/check
find $dirname -type f | 
while read vo
do
  echo `basename "$vo"`
done | awk '{arr[$0]++; next} END{for (i in arr){if(arr[i]>1){print i}}}