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-bootstrap-12.1-squeeze-amd64.iso.sig gpg: Signature made Wed May 1 12:47:35 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum cdd10ac9ea9641480bf16577cb7e06c2dd71d7d1 * md5sum 4ce40b083cad098456fe6dbb88d5b2b0 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) iQEcBAABAgAGBQJRgQ7mAAoJEIXCXpWhbrlNB+kH/2TZJ04kjEPCqQZ2ClYih6Js +B7uEIZqPaRjKFlO1j9Wyq+g1Pa1llV7ry116gP3Kgm8WgTeJCd0k/yPETwjz5kZ J78jIhq4Z/NT6meVXq+g6AXsVW7VAS3+BelSvtb+H+UMKHOMs7OhmAxsGqCHOTl1 9X3LQc565ys+SGh1xi/0BOnwGt+y1G1PQcqGyxefaQJ5u4AteLDIrQ18NoYb5jSB 8CzHH6PwZdsCWfu2+nQYJJ6siHkvbE3GD6CjjnrWApI+YdvwSY9Ja/4/60VFHrzr HmabOA97/XqD0Hm1FCXmMnHlw1JHuCdwbCwUnI2oI5H3kNBCEi2Wu78VbpyjBxc= =diLK -----END PGP SIGNATURE-----