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-gallery-13.0-wheezy-amd64.iso.sig gpg: Signature made Tue Oct 15 15:18:53 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 63d0fa71af378d99e98242b81899bbe7c6820e3e * md5sum 819d1a43c07c51627520751ebc8b4130 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) iQEcBAABAgAGBQJSXVzUAAoJEIXCXpWhbrlNadkIAIZaBbdy1gqaoGX6aHJ8gwrd +BN6qrTMXBNEuBdBS99qhEOYygcU3wmrbUFK3faFTFdXDo19PDdxHX/MNtbx/cNM YWGQkXimb9CU9D4sIl1/36pydSzql7MkWqC15G25Sh7aFKCXuNLDiepvEqViNQaq Z4SBwPVQaAojqOCEQ4JNThPHiCiSQtCvSyK/XOrOdZ9lTBQjZNmGjnSdo96Dn92R 8eBJJ+Re3CrCwI/D1ua6PzHsFmIM0ZVNkmJFc+qpj3kXQqgUInkR3Tq9LfJbM1UK BcNf+VIT7WalgdVJkYisf2UymSPeIMeFsNHVPikv+Rkc4w/hA1C1zkD1LPB2rXE= =q3u1 -----END PGP SIGNATURE-----