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-punbb-12.0-squeeze-x86-vmdk.zip.sig gpg: Signature made Tue Aug 21 12:18:07 UTC 2012 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key For your convenience we also include file checksums: * sha1sum 8c7c1fba220b7e7725e73d21c590611caa7c8452 * md5sum 9ac9272f6ec1fd485d3c37893263f008 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) iQEcBAABAgAGBQJQM3x0AAoJEIXCXpWhbrlNVsgH/RKU2+Wheu4PUk9xWtMSzhpF 7z1H6idW9i1CIcKj09mwtklwKFUjHRZ2kvX4FzSLv+Ma3vurvOI49uFFR1cAUJg/ M8m34NkymNRGz2ZDuVjC53IulnWEecl854vU3DfyI/X5S9P/56BRH9qknK5Uw1WP VcAYw41Aa+ZCZFOFhQ9u6OEzhWY/8RNqI9lQ+epK0vBS5NIMwBsu9o8yFdLMTw5v s6+/jLYK8wXPEaWlWNF5KqWOvcUDlbZHGlsFR+Z1GGO0AbAYXTufvHn5dtBviuRb C8mc2QIXlrdX5i6vddLvlFvLsBNB4jPi0HZz+suH2GMnw7xX9SRzKLHYbjGxHQk= =v2eS -----END PGP SIGNATURE-----