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-domain-controller-12.0-squeeze-x86-xen.tar.bz2.sig gpg: Signature made Tue Aug 21 15:30:42 UTC 2012 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key For your convenience we also include file checksums: * sha1sum e5a0b6b6c1a2d6841d431a6022e6a5a0304735e4 * md5sum bfb82770f318c30d8bb8d9d8266d529e 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) iQEbBAABAgAGBQJQM6mYAAoJEIXCXpWhbrlN6/wH8wViE9FKz9Tq0AxxI5n+XFYC 7KS3+ylm41iIpWxvWcL6yLSkGk9lPHvVUXim+2nB8fkv0lw4e4J9yez2Vzw4xErm rerzBgWhjEZmncunF3UuHy9wy6GPsRHcXvCvh5AAr0YY6QCj31Xov1R7co34rd+y SPYpR/NsHycE9Uf+K6EdREMU1z7aH9PiOY2YJDLi7CtCpkWa2DAsVcygLq7t6+vR l4/P5lZ3P97a8bw99xwGrXChbBsYHbbBtFx00QakjA5NaX7MR+1eOQPB4Upke2Fp 15aqvqCbEgmUplD5qhY5i8HXVLYMUB2CqQRdEnKYzcWbGo6yjx+z10IDzXRvkg== =fSlN -----END PGP SIGNATURE-----