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-openldap-13.0-wheezy-i386.iso.sig gpg: Signature made Mon Oct 14 18:14:26 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 12037c4e8c457e7765a882507da400e33763881f * md5sum d57ac7c2a017df1d4b1a5c1f69b14b48 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) iQEcBAABAgAGBQJSXDR5AAoJEIXCXpWhbrlNDfgH/R/ZdySNY58RT8bcFpkGj83G IDHnLE7x3l/WM5xpnb3mbG8TapbkoFXABUWtxS15mQ4bJL6Q/m7rRdeTUgFv2HKP 4hBc+zfGB1ihvE6M646+dM0JL1ZaCwX6kf8PzPgQGulimtU4qji1uLDYthlpn2rU BiyOG8JqEQdSaWlf6vyGeqSlbm9ASiqa5L5SE19VCPp+VwPcpx4RnvFfJC1htMA3 1Zy9eEeNj0MBPJ4SwXWVj0R31D0XPlgpR/UN2svWfgSIkZNJxnv7mQy80bX0rRgx 1oJqyu6CYa8UCtoqdRWS3fKau6aBDMNKP8Q38t0Vud0XPuvjkEQU+oqZFruRfYA= =gvRs -----END PGP SIGNATURE-----