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-simpleinvoices-12.1-squeeze-amd64-xen.tar.bz2.sig gpg: Signature made Tue Jun 4 16:20:50 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 7bbbcffd4860ee2221ea7fcd58739546e37ba43f * md5sum 4ab16841f56c628a86b44d8d2017207a 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) iQEcBAABAgAGBQJRrhPbAAoJEIXCXpWhbrlNDjYIAMZn+e4DjGammxz+VO+x6yQU dL/YHJCWUsLHugPylxFy4QZSiw1gaHpOkdUDNwB1rjK0sPpKRNQfCnvlDQU4RZBg RWLdnU5EpmbfnBRz6AhYTVFgqv+42kb85aZA0Z7/2n8/jm5s8x+/H3nKZK4McqiO 8dwp3w3j1fPO/Jg0N+78Nrwq+U1xpQ0Nk5IKs9EDfFTluBQORGqTz9hyD0MB4otz 2ArvONF/jRjxG/zKeHY46YxtL2vA5EnR0diWGco8k1cgu9o7sbtTXPECAYONP0Vt uJt1bH5jaUJwJaZeAoAhrPfEJO1ZvTVBEGHUgKLoTaMZWPYxpggYbAdTGEqa+tk= =76dD -----END PGP SIGNATURE-----