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-openphoto-13.0rc3-wheezy-amd64.iso.sig gpg: Signature made Fri Sep 13 08:40:16 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum a65e707e8ddd7d6736e5b4c9bba7c38cf5fcab46 * md5sum 4a5b8096cef3dd20639f21773d88b10f 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) iQEcBAABAgAGBQJSMs9nAAoJEIXCXpWhbrlN5nAH/1DQRFARf9/dU6WKp8AtVj83 uXG866pev9y9acHuhXc5o899W21wyViAYZV+iWjWiwpS3Pv6c4qUvpgEVtiRbJ6o cbjhPV25MKjZ1wypRbdgI9sqAckbYPK4hXnufumnr4GNsV+AglWV/DkouVmUxwuq WSxCo0bZ4lWp2y+J5GqzbX3GN/UypDE0f/0OZJn828mcQzlKuRfzQH4d/SeoXQ3r hthftDqcze3iPGe5f30FFQtosAhMHyvmS0DXfl3NdYiktEKCZXoo452dI0VLxiRt PcDDS5AkIomU3Tw1ZUc4Fm+Hck52/XEbg1uk8c6pGxZatHZmbHh2KtvbvXNffyM= =0i57 -----END PGP SIGNATURE-----