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-joomla15-12.0-squeeze-x86-xen.tar.bz2.sig gpg: Signature made Tue Aug 21 15:42:30 UTC 2012 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key For your convenience we also include file checksums: * sha1sum d94f752e5846834aa03ea5a10df3478896944b79 * md5sum fc841cce5f3865d33b1ab98bfffa0327 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) iQEcBAABAgAGBQJQM6xcAAoJEIXCXpWhbrlN7bgH/0Z6cKr5HBBvFjUJFz0s02YK /CF6oN2YOJ0KY0mjRFNqubsZnf+lkdVxFp2UG8YVHI3Do0RuS9Xx5yurgEexK3e8 acE+R+WWxLLg7gGwQvXkAXfjAG8A3KSyBOeWd3F00Z98l0Mje0aIlmZBZakeAsst DJL1cORPuiEnbT9SruC9XEextiTO35fW/4/+5xjoJpxYDl0fknXbqgS2n44Q5FL8 KsEdPKZd1Qc02BzPbFRAQ8vfs8OSyWrJAq9KjhuTGE2SkeI8LG7cfmKYQeVVF3JT TzfzIsAdMIGxnyz2XzkefMyLWOtAc1rxBulipGc2WuI05kGHAGGNJ+6uf/f2X/8= =U4IA -----END PGP SIGNATURE-----