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-b2evolution-12.1-squeeze-amd64-xen.tar.bz2.sig gpg: Signature made Tue Jun 4 12:46:56 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum dde55e23261a6041fa05cd769764b9cff84e2601 * md5sum 3e8593bc541d9c2b26d5ba43a14b213c 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) iQEcBAABAgAGBQJRreG5AAoJEIXCXpWhbrlNKOIIAJT1iSC+AVM8FxreBGaud2H3 mLLf51cet7om9O4AkFcsWqGGtQpnWtUOzoLtDjFb3pC0JWQ2UHKx4m4pj4/3Y86n JZmkC7cNH94PM/k5V7zPBxpVPdIBn8KJFDJ6FTViByfz/QvfUAO/7WvYLjYEqFgd Q4b1v2uC2KaCv38d8cUUbBLNe6DjMQwmtPP1V2TLaUUjCWPxeqDwBAF0G4jzkTzl f/ylFTbXmeFXvUkKX11NM+nzINNfceQ8gWQO5trwU1Dv6Z7hfmpaVZsWSS02wPym R17TAISdhZRt+lZYCFjxh3/HKtogs8rYru5dl1n8R4jRnhg+95c+6ll0tnqA1gk= =aJ8A -----END PGP SIGNATURE-----