costa

require 'digest/md5'

hash = {}

Dir.glob("**/*", File::FNM_DOTMATCH).each do |filename|
  next if File.directory?(filename)
  # puts 'Checking ' + filename

  key = Digest::MD5.hexdigest(IO.read(filename)).to_sym
  if hash.has_key? key

costa

#!/usr/bin/env ruby

# NOTE current directory is assumed
# NOTE run with 'rm {}' to remove duplicate copies (while taking necessary caution)
exec_command = ARGV[0] || 'echo {}'

require 'digest/md5'
require 'shellwords'

filenames_by_md5 = {}