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-revision-control-12.1-squeeze-i386-openstack.tar.gz.sig gpg: Signature made Wed Jun 5 00:07:43 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 3dfd08c2f551ea59d7ea713201ca790692f7f94a * md5sum eda68d2ba9c4431a748a5b1be2c200f6 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) iQEcBAABAgAGBQJRroFCAAoJEIXCXpWhbrlN3KgIAOJIFcmMrQ2jpJTeEFp1neZk 7waejkoNCJFoeEEtXXFstHqyQYUJHl0jmzOTN3xiAR+r7nzdjRzPDDMZLKXyz2zh Hg+hclXnzLywYzZmISwW8OlY11eiJcxNfjkzcYLT7hfRF/ORL91fQSfYR4KAGiyc Hd5a9+8ouhm9QUb08N2xsR05PIYT0WUpm8oOg+6X3rYhvq63xtv4G81Y+JMs+1A3 PJPSxSulVhjnKYz06wMhPCIyi3M+q1tKXpb1E9Cwced3C53ZxPVqZcTZNgyiKTQ9 Qdz9JB4TRDbs7kzSTrZTO9Tqga1a72GrR4zeuagViEeDtNQJSeSBKdpOr95Da0Q= =eSTM -----END PGP SIGNATURE-----