The Debian 7.6 update ISO hashes are missing on bt-dvd directory. http://cdimage.debian.org/debian-cd/7.6.0/amd64/bt-dvd/MD5SUMS http://cdimage.debian.org/debian-cd/7.6.0/*/bt-dvd/MD5SUMS They can be found in iso-dvd and jigdo-dvd. http://cdimage.debian.org/debian-cd/7.6.0/amd64/iso-dvd/MD5SUMS http://cdimage.debian.org/debian-cd/7.6.0/amd64/jigdo-dvd/MD5SUMS