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-appflower-12.0-squeeze-x86-vmdk.zip.sig gpg: Signature made Tue Aug 21 11:27:36 UTC 2012 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key For your convenience we also include file checksums: * sha1sum af114441af4286fc204281e0db5068779921eec6 * md5sum c3c8e57627a4d8290ab8be603d21d486 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) iQEcBAABAgAGBQJQM3CcAAoJEIXCXpWhbrlNM8kIAMdKW4zY8XSvezK6L9IVKMP8 Lidx0e8Z/IYqHEXTYNpAAM5RnuZMiMIdN0BdYEEavREauqh5qwhybNxCPd/ntFmN oA82VC8RNJi+V5RLcKTVqzcfLWs2GssME/qWWzmHK/a0tgE/mspZG73u7AqVMKik 7xyxEZbBhAeZ4LbfAA7p0NN3Kmw3JVREpWddRdAWvKQklZS2ShMmqHwsn4XXQUFI WHqIzXApawQ4JJX2GrfROzWeDmxLunubkxPMLL9vLBdtujwtI06hY2+oIoJOOyjX /Jj46WN9spnXpaFByTrBz80gz3n6EwNYWQw+I3zk/P+aNuBagfbkxcqeSvsSk/4= =LwOn -----END PGP SIGNATURE-----