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-fileserver-12.1-squeeze-amd64-openstack.tar.gz.sig gpg: Signature made Tue Jun 4 13:40:28 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 519cfbd8178e759d6418333162c496df1121ff61 * md5sum c25be29081a46e65a88f7be90f2692a6 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) iQEcBAABAgAGBQJRre5FAAoJEIXCXpWhbrlNwDwH/RpBfjbqU+hl2862Y6i0wauE JAywvV+y226gmkumn2zRgTD5lDQ6/ljxl0oNTK14njl9/108UDj9h1iuoBUfyH70 GltKk/HHgeRF9eRZDCKIjlxJOh+jhNYJl5YBkyri+myDdEVp22vb9slBCz0r6MAJ ZzhcHTxY/Gk0HNhi6uQIiPs4WaECCBkiaMRXtR73vt8VHhbvtVqgXOHRL8bWppQ6 jxHmTNOi0Sss4TC4fg9O9BV6rn5VLFsr72XN9zWaozjMHnvtewYhlm+6CFGb+8UX 3UoVBlQDQe0z6BiRgvwhCD7oyWNd/pz6fuJHn9TjxBoEmS1XEJJna0A4tUqZILs= =fQS+ -----END PGP SIGNATURE-----