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-symfony-12.0-squeeze-x86-vmdk.zip.sig gpg: Signature made Tue Aug 21 12:30:19 UTC 2012 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key For your convenience we also include file checksums: * sha1sum b229afb927a6cc9e89b6915e639577bb156ff7d2 * md5sum b957cb4be4c109d055b0cb7e4cfd4ce0 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) iQEcBAABAgAGBQJQM39PAAoJEIXCXpWhbrlNbWoH/R/smIoBqz+SjoyztTnTkLFb 0ZN+F25BYaNWd1ZdfQMJHVpnzZoKzNq3D046HPk4G450Xecj1L8noIxHxkR6qsjb zp0fx4kqRHA4Lfpt1iQNy/9ADb+qlTjUhkv5Fd13O1bwk0IdCJgLcki1NFV7BikA fOz0OvkG0G3vtwJmYvX4dLTKZG+GNcRTpaPKg6ezrN8VDE0wOaJlCi3xi7y3522m h3Z2FGWGm4MhdyGtD3zjlXf96ADd+EEFVG4vs6sQ2ye0Es7tLWCJ2dG8U0+YhHdm KN/3K7e+oPcQLXH2feLrDjZQzEQFjhLdvwBHTj0JY9gWKUBxILZUXK+u2MOCH5Q= =9ZCd -----END PGP SIGNATURE-----