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-fileserver-12.0-squeeze-x86.iso.sig gpg: Signature made Sat Aug 18 17:05:18 UTC 2012 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key For your convenience we also include file checksums: * sha1sum 360468bc63920798705b35982cbcbea352eace52 * md5sum 3e1d895c82c3a6ee88175f88024e4bce 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) iQEcBAABAgAGBQJQL8tEAAoJEIXCXpWhbrlNGtAIALHCWwU6mY5SELc+atzbB5LA j1n7Ei0fIAA1amLdSiXId76wV34kEv+/Th8rGiBBOrB+SngKIJC49pshP274yx2Z w+5avuQRGVxwMvlTVpUKNFURJ0tdqY5T2+66bBqCrBvqxqfhE7/Hsdb//8jRbqYK 2o8dTxkFUG4fAR1afXoe7dg+0Kd0V1iFVuZpPgOpti4CcPWSENkp19LXezZOHoxu wBa5hQLT6oKIBeWdgRTOFkC5ewlWEYZBodD5U83VXorQ50C/H0k/e/FP+cTSrSna iukeB5eLBGH7WW2lVNJsKHkyb2yKwZQ6LPlmjMRUECxgX2EqWR3YZ6HM1j/Jmik= =a9eo -----END PGP SIGNATURE-----