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-moodle-12.0-squeeze-x86-openstack.tar.gz.sig gpg: Signature made Tue Aug 21 15:49:09 UTC 2012 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key For your convenience we also include file checksums: * sha1sum 203887eb9f0d43604a6c51873e674a15a64c1788 * md5sum 6b2809af23507057ad6ac2861824ecd4 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) iQEcBAABAgAGBQJQM63nAAoJEIXCXpWhbrlNDh4IAJvjttpJEbzUpYEYylpT+SPU 3T6X8/zSOoi7jZfVlsNIjLJWLPIt64d9OVlwr2cMLKM4QFA0rPi4xbokCJaHtuuT 3pZno0XB/8JxMXuDWEsCcoMXYFPIwgeHY9g2zf1KRHNU7cBWqUksZDbhO78eMH+d dQhsJXkUPdi1sogJ0hWRY+mD3A0v8PnJQ+/TqZAmNn6RdOpI8aY2ozMwaxzYVrJ6 HTYL4jtfUvH42GcmGBmzS8ZwA23Zd8lvEZBY9VlCfefHOD174e+82kWQtmVnKvMK aEWHm/bVnGSXEfyboCf11CqAAih1mO26ijXtgSgk8eY35T+mJ2F8yWsi5LNWPkI= =tAmI -----END PGP SIGNATURE-----