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-otrs-12.0-squeeze-x86.iso.sig gpg: Signature made Sat Aug 18 18:12:37 UTC 2012 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key For your convenience we also include file checksums: * sha1sum aceb64a6cd6a6df4910225296755a59e74410125 * md5sum 7b6f81f07b673a85be54c368c4cb0bc3 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 v1.4.10 (GNU/Linux) iQEcBAABAgAGBQJQL9sJAAoJEIXCXpWhbrlNRCYIAKXNS6CJiz1QDjPpATHZMvu7 yEAmqkIjySEIS2CbsJ5M3Cx/dZVJ5N7MPRUWfqfrj9sAHk3SU3QqWmVJCvtra3Qh DAFRRTJTVv8Cus18k48F7AEBxBG6ynM+mS+Ld7QjaQPmNzqzCYX0JIM9DCWBe8Un 92+4XBbKnkRxlkw+uKVquAiz/LLoBRLcAVR/hg6oAqwEUfg6GfheAZXIBUbA3aNE IbKsin4Jp7WEAbowXkEf2IBqP1hThb/Ft46u5SZpijlL7fW+G9wxUWkRQ0i/zx76 zkAMoextg0O3Iaept8r79qeMj5oTeiuqEgdQzGUsYqZXuRvCMZhu8G6TB3a2Rsc= =56eG -----END PGP SIGNATURE-----