create file1.txt
$ cat file1.txt
i love linux
i love python

create file2.txt with same content as file1.txt

$ cat file2.txt
i love linux
i love python

To find duplicate contents with different file names in the current directory

$ fdupes .

To search for duplicates recursively under every directory

$ fdupes -r /home

To find the size of duplicates in the current dir

$ fdupes -S .

To find duplicates in more than one directory

$ fdupes /home/<username>/Downloads /home/<username>/Documents

To display a summary of all information related to duplicate files in the current directory

$ fdupes -m .

$ cat filea.txt

hello

$ cat fileb.txt

hello

$ cat filec.txt

hello

To remove duplicate files in the current directory

$ fdupes -d .

Set 1 of 1:

  1 [ ] ./filea.txt
  2 [ ] ./fileb.txt
  3 [ ] ./filec.txt

if we want to keep file 2 and delete 1 and 3 

( Preserve files [1 - 3, all, help] )=2

then 

( Preserve files [1 - 3, all, help] ): prune and hit ENTER

( No duplicates remaining; type 'exit' to exit program ):exit

To preserve the first instance of a file in every set of duplicate files and want to ignore the prompt

$ fdupes -d -N .

To display help options

$ fdupes --help

regards,

T.Dhanasekar