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-appengine-python-12.0-squeeze-x86-xen.tar.bz2.sig gpg: Signature made Tue Aug 21 15:11:27 UTC 2012 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key For your convenience we also include file checksums: * sha1sum b031b2e169d48dfc24b33c43760638baa77d19bf * md5sum 508e534e1941dc404ec9c6f71199c9b0 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 v1.4.10 (GNU/Linux) iQEcBAABAgAGBQJQM6UWAAoJEIXCXpWhbrlNd08IAKLUzHIi41MSfS/k+HBzk2st pS8dGa/h6VUkn7ZrJdCF7e9kb9AaK3p+QZkQ6RIgBe17jQQouLI09Qjdx+keyHyh UQmODZYSYKB9uouwu2jmHRHB1WiCxf6Bzi39L5spy+OM4+Y+nNWm+opjtl71HntW C7/zGSJloi1+fAc4oQC/dGICgayqwX4EEo0MmmKVBfKi2A8nEPKH24J1YPJPvPRc JrHpU3N5tt5J54d614YB03D3spaf7Ee2gCyytV3yiXPQI4J/FQI/bRAYdHN2Sxai wO9vfN0VrI5kIQQRXHvRFV+9j6l5/srnvDsLj8U1xIPfwHc9QuF2heFKM3n7JFo= =YVn+ -----END PGP SIGNATURE-----