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-phpnuke-12.0-squeeze-x86-openstack.tar.gz.sig gpg: Signature made Tue Aug 21 16:09:30 UTC 2012 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key For your convenience we also include file checksums: * sha1sum e68b72d7eb90fa5266868599f80812d2f07d782c * md5sum 464b367cc2940fd83771d59d667e8e2f 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) iQEcBAABAgAGBQJQM7KuAAoJEIXCXpWhbrlN+zgH/2HCUb7o7ZV+I72XIN1RMkKj rcYEo8rEMWClVgv0sa7rrQaw0qHGBpPW2Gxc126zaTQzePJ2h7kHJCzqk08nXFLL tyltegyPiboWMHR4CJgcTbokJRDAo1ZHv+m0gz3Q/xC6tx+zedExRFd21rAIUUoh KyT9ikuHkgCZzh9gEH+1kXyv0NRJTwNhvUMG/YWSrDvLHi56BZsqaNZtMEv5+l4a Wk5hYfAvXhxIuyMNuAzi/XhFijbsPD1jPczwO8+ZwWpaQCdsO7KAFxCxkznUdTW9 rSSYrJHb4qtu26Hl0BDCi0Shz4CkxrHaa+W2Jxv6hrFCSVfSQiGPGwueCIW7M5I= =EC3O -----END PGP SIGNATURE-----