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-sitracker-12.0-squeeze-x86.iso.sig gpg: Signature made Sat Aug 18 18:06:44 UTC 2012 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key For your convenience we also include file checksums: * sha1sum 136c3a57faaabed51f0bdbf6f12811142c96fc90 * md5sum dacd7ff8d03c482f6d3b79def205461f 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) iQEcBAABAgAGBQJQL9mqAAoJEIXCXpWhbrlN33kIANBLsgF+KJ8RSn1jytfX7Q3J EBB2yIdo0NAUN/QrvkdT0PYXkOYtnwz6YCXdJEwGsPePXk/skRGxMxpA44eEEN6U FL7pnT12zt7PhyMZQ9RZzbyYqASqQ2joAEC4vhf8xOEBVQyVpRGwDJGgnA56xr34 ui3sFz3rBpKeiB7I/6MieWKfIZWeBJI9GSjdu0FoCEV5iJvrAnMRyiOApw7dZdUc B2naUg8pNw6EXJG17SAHeLtGQY89x/X5YVKCsUSBzZEFMfFPS15hYt7kybB1KlKy 3I/dBXMbkNdwTHLLGMeMc382BmsrNjPsP39hkfkXphjX785nJ0sUXJY1fHNRmsQ= =+7iy -----END PGP SIGNATURE-----