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-phpbb-12.1-squeeze-amd64-openstack.tar.gz.sig gpg: Signature made Tue Jun 4 15:07:55 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum f5228f846405dc0ca52a9ff9a9b336dfaed5283d * md5sum 21e454301786e469954144bfcc59920b 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) iQEcBAABAgAGBQJRrgLCAAoJEIXCXpWhbrlN6c8IAKTTRz/q4mBzdxufFmdUQ8Rj MO2xvfUvwLpOuySOVkgrmgGOEnerBzGBMpcHCF7qq+1SpTV+xP30o0PRqTNXn/u/ YsUy6mrJvc1zsMTVVN569ntS5zoef0gcV1SLoV8q8cF+5x6BQAix5+qxvJC7D9Eg +XpBG3bPTxHBnzL7XAfr89XfjrLDKwxEZAEhSqYlsjrh+qoedi3W35gIXFrV0sRu SnVBlwOPvyUs3edFwDSIq0asKv1PvBqT7S6esgUoXFdsmAIrfIMjxB18l1Lke19G ivohH2RgELuYPpniDxpLZhjg3xCWkBLeEA0SFVkz7Kj2Qdr7+jZtaOylfnwH5Eo= =3JIF -----END PGP SIGNATURE-----