Remove Duplicates

#!/usr/bin/env bash 

  ######################################################################
 ######################################################################
## Author: Adam M. Danischewski, Created Date: 20190904, Version: v1.1
## Major Revisions: 
## Last Modified: 2019-09-05
## Issues: If you find any issues emai1 me at my <first name> dot 
##         <my last name> at gmail dot com.  
##
## This script will scan the directory where it is run generating a list 
## of md5sum's for the files that are then sorted, for duplicates the 
## first in the list is kept, all duplicates are deleted and symbolically 
## linked to the kept file. 
##
## Note: Permissions are not checked, make sure you have enough 
## permissions to delete and create files where it is run. 
##
## This program is free software: you can redistribute it and/or modify
## it under the terms of the GNU General Public License as published by
## the Free Software Foundation, either version 3 of the License, or
## (at your option) any later version.
##
## This program is distributed in the hope that it will be useful,
## but WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
## GNU General Public License for more details.
##
## You should have received a copy of the GNU General Public License
## along with this program. If not, see <http://www.gnu.org/licenses/>.
 ######################################################################
  ######################################################################


[[ "${1}" =~ ^- ]] && echo "Usage: ${0##*/} <file_frag_suffix (e.g. bsh)>" && exit 0

DUPES_FILE=/tmp/___dupes$$___
LOG_FILE=/tmp/___dupes_log$$___ 
pwd >> "${LOG_FILE}"
 ## Generate a list of files with their md5sum's sorted and dumped to DUPES_FILE  
find . -maxdepth 1 -type f -name "*${1}" -printf "%f\n" -exec md5sum {} \; 2>/dev/random | sort -k 1 > "${DUPES_FILE}"   
while read a; do 
 keep="" && while read b c; do 
  [[ -z "${keep}" ]] && keep="${c##*/}" && continue ## Keep the first entry
  echo "chattr -i \"${c##*/}\"" >> "${LOG_FILE}"
   ## In case it's invincible
  lsattr "${c##*/}" | grep -q '^----i' && sudo chattr -i "${c##*/}"  
  echo "rm \"${c##*/}\"" >> "${LOG_FILE}"
  rm "${c##*/}"
  echo "ln -s \"${keep}\" \"${c##*/}\"" >> "${LOG_FILE}"        
  ln -s "${keep}" "${c##*/}"
 done < <(grep "^${a}" "${DUPES_FILE}") 
done < <(awk '{print $1}' "${DUPES_FILE}" | uniq -d) 

exit 0