This signature file may be used to cryptographically verify file integrity, like this:: $ gpg --keyserver hkp://keyserver.ubuntu.com --recv-keys 0xA16EB94D $ gpg --list-keys 0xA16EB94D pub 2048R/A16EB94D 2008-08-15 [expires: 2023-08-12] uid Turnkey Linux Release Key $ gpg --verify turnkey-simplemachines-13.0rc3-wheezy-amd64.iso.sig gpg: Signature made Fri Sep 13 09:18:42 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 253d4985ce6b6ffdb0919d5024aa5679b48a66c7 * md5sum 12ba61df979d50831bcd70019331d4ec You can calculate these on your end and compare to check for errors, but cryptographic verification is recommended for security reasons. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAABAgAGBQJSMthqAAoJEIXCXpWhbrlNxosIAJnOnzE24RCwCq+16Owq6RMF ihMDA7MeYdFhmcuvqo/cjdFg7IK/xFIWMI48538F8JRg6e8YBJqe0wxtbndLUZcD tC4UyKH9QPgrkPfRyeIL4cAoCbJn3kXejDWW2ZpGW/9ARBXuM3hqqqP/AZP7PnwM MztplThkcCPHCJNcs7tVtmbcQe6aj33kLlFIScnNCi1P2b5qrlvRmgjX8vxkTom/ D56xBnfsQEyTDf08V7DUefiISLK57cGkO8Oj+N8X8dlQZlv46qMGMyS3JS5kUYE8 mJQGek5NwxFCMquFDduva1+L5cbGrimZK1FmrWQ5Mo2SznSURWCg0SAN4TG/v3Y= =bxDR -----END PGP SIGNATURE-----