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-phpbb-12.0-squeeze-x86-vmdk.zip.sig gpg: Signature made Tue Aug 21 12:10:01 UTC 2012 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key For your convenience we also include file checksums: * sha1sum 47d83c6a8f07fd11d37233a579c4a4c5dfb0affc * md5sum b4ad12241a30ad6d95f6a7918b4b2931 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) iQEcBAABAgAGBQJQM3qPAAoJEIXCXpWhbrlNVEoIAKQWK+goE603/gnriE4A5j32 pzuMDWcfZTOutg8uDRlaqaF4pC65B3RMexoi012mF58WR0eK1PBK3XgMKOZ2iVR6 YbAIyov+eGFSnxeM19HUkQRoNKBO58RDhOR+ED1yXWiaszQaacVXl5YQkM/D37Yx GftaQb9B96GPeQudO3jQRxkEsGXQ+AQHfHKsLG/0MVhRSjiB6NpJSJ7T0Eatunvp 1Ea8ihCMbnQZx5M3KPjT6gDINdX1ve4+BYUMYZ81OiWJeOKUy98OdTmlnXFKf3ys I9LmlMVWUFkL/7G4mIbTq1quNLv2WL1im/Yuy7aA67T0padi5waZ632eiiukkRQ= =hYeO -----END PGP SIGNATURE-----