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#!/usr/bin/env ruby
dir = ARGV[0]
a = `find #{dir} -type f`.split "\n"
h = {}
a.each { |fn|
md5 = `md5sum "#{fn}" | cut -d " " -f1`
if h.has_key? md5
h[md5] << fn
else
h[md5] = [fn]
end
}
h.each { |k,v|
if v.size > 1
puts k
v.each { |i| puts "\t#{i}" }
puts
end
}
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