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-magento-12.1-squeeze-i386.iso.sig gpg: Signature made Thu Apr 18 13:05:50 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 9a2325b986e97cf668ad4454785db9deb71ba762 * md5sum ccdfbb28e0cc2e44605753932b822569 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) iQEcBAABAgAGBQJRb++hAAoJEIXCXpWhbrlNahcH/0UImFIpj67FZFBsd6iTzGhX GuvLVUGoy7qC7Cgb2b5LckriI6e0aYD+7NcO/FGeZ0k0qrVGm8Is3g9lFE995LfU QfZx8YwY8Jbq/1AGyTc5krwnqdQYVaHMQDghm5a1I3h8RdeQd94Z38fRzShZvTly 4d3Ho+NAXGYmxiNNIDqFiiW0cySG4QMPY4b22SSweqiODssy2xaY62cCrKcjhRjM hVwhOt6GY+yxHVBWvHamK0PbtvaD740zL+0qNMlzbMRfAVUAu6vVhU92AQPzPvuN r9MIJ3+xUWsveIfBopbglhsfk74SYWb1wO4FBDwUjSh+2rENl0PIcB84ggrYUv8= =z6Ts -----END PGP SIGNATURE-----