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-e107-12.1-squeeze-amd64-openstack.tar.gz.sig gpg: Signature made Tue Jun 4 13:20:26 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 5c1f580484ee45b540d91898993def48d7798397 * md5sum 4a9243cb2f7a387b3b3c1c4d5d26c0c6 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) iQEcBAABAgAGBQJRremTAAoJEIXCXpWhbrlNCLcIALKhzKLN7KJVF12jldhNXyLm ttEKsX0vG8g7/uSNlQD5Bh8F90eZeJHmyRsi4xCj0pB0IznQUvsjXaRMl6dKd7ut D8zMGJSkhgVaNUA4W1lk3iKrDnivMzN4hWIwF0cggbef3S6jZvmWi+Gx/QN9Agn0 4YTfFjwic3fuLMZyDehoA3otFd/EcDUEgA5ZCvNGiuF1V/WgwAGXxHXJvZqb4uuj Vs28UgEHeSBQy9bjPdbAe1vl+Mf7uNmQmTGrEuIx7qVfMxu7LNVwSKfHPluDPoG5 EeXMJ4tusrfo0/8fShcSlba1tYTdjK+Q7dqjH+EWuLOa2I3sD+2Kb9J7NtSnQJ4= =rQGB -----END PGP SIGNATURE-----