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-plone-12.0-squeeze-x86.iso.sig gpg: Signature made Sat Aug 18 17:52:06 UTC 2012 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key For your convenience we also include file checksums: * sha1sum f43fc8b95416215808c2cfbeea5562981fe1e136 * md5sum e6a61c12cb6eb73aa40de1b2b168b814 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) iQEcBAABAgAGBQJQL9Y7AAoJEIXCXpWhbrlNodgIAMt8JfEw2Elg25JnE4RThYgO uprRivVwknH/RhnQOWrkM03lwA144EWOLMtH+ooAceGC5S+YHz5xtsxytE/zzym1 Ruu1jSbpyKBfBe0mdkLCoOWOWMqd5+aYNNaCxtp7KX/sDtjgGUGaBSIuJm3ErD2q pUjYPP5cQ0vGiBnv6QBXOZjZfMk6nGRGKPLEy13BJz/ingikmIM58M0FWK+rVO9J Fmz/yBv6FxO3m1uniYtKiH6RJB8SHCQvyzOBYazwXR6NfmuQVSZjNdX7h+wFkCkY XuQDYjtJr3wlhml9HXJWuz75l/BAwy/oXOC9o3wKRspU3YJXQaHsXF5g90m23S0= =Lw3z -----END PGP SIGNATURE-----