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-13.0-wheezy-amd64-openstack.tar.gz.sig gpg: Signature made Wed Oct 16 08:54:21 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 9bd5a625a12ab5db63eeb69245d80f0143cfc948 * md5sum 82cfaa6df8f2db9d6174ccc9c598234d 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 v1.4.12 (GNU/Linux) iQEcBAABAgAGBQJSXlQ1AAoJEIXCXpWhbrlNLjoH/ia/2OYMBFdH99Zx+Z4hhpGH Zb6b2a+wP0GhNpi5lUQLC+U44BmH/4vJ6RMsmjIACND698cvBc22yxjswtG9CQ+2 H+Kxb3EW+tkj7pQJ3YiSzTTD2A4Ju8jvL5bB/3ct9lHrp1BnEQT6nazLILoM3dmd Qr38HVf9Am4VjGuEa005sRYaZHq7bdHGUWgI+32ihBcPxgbrOX9wPYeva+YlIx6J 4IWeV1P/6Pd9l8ZzYg7dntOQs/g8RLAxj8xr29NcGgLN8YIoreW3GC1juv8plFGv upcor3tb4TC2vBPzepCLGfPMLVVNHdbeFNyKVSNK5n6pIXvd++dhMieLfZGp984= =YZVv -----END PGP SIGNATURE-----