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 debian-7-turnkey-simplemachines_13.0-1_amd64.ova.sig gpg: Signature made Wed Oct 16 10:18:00 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 1150a8201e9bb685cf65a4441e494ec23436a525 * md5sum 9a616c729cd17379d19df4cc0a72ddf0 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) iQEcBAABAgAGBQJSXmfRAAoJEIXCXpWhbrlNZ/cH/Aq4wu3et683txW2PU3coKjJ pG1wmSy8ooYAO9c2biFB2RLbjLX1eYp/IuFTBi44QXcrkw6qzXrcgMHemvjl8jZi FCtGLU3DccyOQcHfOTMj9gO1aW9kfrdB5KRUadZHdcsjkwj7POeYTzlqbF9IuJs8 LseYysDgxv+5Q0C4iNm0yMXl+3aE2S1rmAJiICwWmcMvFp4gxHPxVN20uQ6BtEI0 YnGZHA5it+wC8QJdEmi6dbXS8xu7zqIODwNv0wGtYAD2VWY6ESmMWgKyTb0cANDz bKRXvEfDlVG9dEsKPfcBpoHe4g+IIbV3+Bhqca9a8CmLr5gcYZS6Z1Hxcl6nt+4= =4HL4 -----END PGP SIGNATURE-----