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-projectpier-12.0-squeeze-x86.iso.sig gpg: Signature made Sat Aug 18 17:55:20 UTC 2012 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key For your convenience we also include file checksums: * sha1sum 22f0ae18d0e14470e16b14c7f5434c2e71ea7938 * md5sum 4b0387ea4eff748fd47fd7e26a384418 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) iQEcBAABAgAGBQJQL9b+AAoJEIXCXpWhbrlNEc0H/2GTaeiwWCZ1tfRdCiFPOwb2 clxtUqVBw64AtIQoGI0GK6cJ16CiL5c43mUOB4sO+8INLi194b/LxCghHiKNbBMa DTQr5txiCiNkvub6+BefgQQLQD5U/yOf10gfZqM3eZmWDsCUG82yk3H3hpSKPT+z sXfT/zti+QQ42S0UdOpEKtjapmQswi1gyHn13KZ+jlQTYunAMg6x7ugLUTdDnAMw hYZKwuHQSt1JMFMWKur18Iow/T6quUhmFIshE07LK0JkZQmc7L2EKmpgUQAO2Eh/ tihnbjaK/PmCi0JJBTVGr2MttPNIfPyeWozVDzigJ3IE+YyPDYa3dddLFuhc1zE= =uSaX -----END PGP SIGNATURE-----