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-zurmo-12.0-squeeze-x86-openstack.tar.gz.sig gpg: Signature made Tue Aug 21 16:52:01 UTC 2012 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key For your convenience we also include file checksums: * sha1sum bc6726d7c2289b514f804c0f96178665af4b49a1 * md5sum 862d59f5581bddd8086173bbf9483c7e 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) iQEcBAABAgAGBQJQM7ymAAoJEIXCXpWhbrlNPxgIAItYv/vIAQMRsGOjq4Svj0uW YYTM90XmTAlihI5dbVyFJFo7hjyR98SAnr4p6ZC63ls81ttNK7vTZiJ1ucf65MFX tNlfj1E1SQgSEX8dpM8XD9OQZs8Oele5QrIcc8h1aiGhBSk+r9KgbmDwUDPiAHc8 vxfitFO1lqSyIa4rvh5VO9NsqaQFe3l6wMHN7Gj1O0N67kl2wzPhVPKf3n09wTV/ TiQOweE5BA8uVKQYPoy2x2n0HjHTXX6tQ8DyHjkks/Up7VHyabvm7DYx9waNiCRm +rr7T63XwOA59VTdxohBFH6ldhzXCxYF6QMzLLTl7HCVJIaqo3RG1jDkooZQzpI= =BHcj -----END PGP SIGNATURE-----