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-tendenci-13.0rc3-wheezy-amd64.iso.sig gpg: Signature made Fri Sep 13 09:37:41 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum b7d056bf6c10ea2a8532d46b4ce5b8f4b68b139e * md5sum 895c7c2ad7a254367113d16ae0a55694 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) iQEcBAABAgAGBQJSMtzcAAoJEIXCXpWhbrlNSQQH+gKLR2ZfSSzFM8HvkPjxkjX+ 9MMd17Q1UcCv6tW3a4Z94Sb5vcTW2zRPwh6e03NO48CdCakDuz0nnfJ+wL48eVpn 2dcxeBieRALvWv6FeU2QL4ldyJreU+kzoqXjAEld5hWXqetvq3zWTf9XxswSwEqT jpzinEIAngRRN6cQP3PK/FQfz6kKhEbuCG7H8JipM9CaVzDqYeMtsL4GvUQyRDwr 0Prg0GYSIokyXtxVs1XemNcXffQbBHH2ik3HmbA/+lhkyHmd3d4h4fISuW1cysLL iS8eKPHHwvU5QL4FL//Dd/1eom/Np+QPI6uFH1gr9ZvmIgl5LWmHBsX/9Hn2yJQ= =yu+A -----END PGP SIGNATURE-----