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-revision-control-12.1-squeeze-amd64.iso.sig gpg: Signature made Wed May 1 13:37:37 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 4359b17f8579bd3f803d10100473f03bf0e92cf3 * md5sum 6267abe7468fcd80d3d9b3a339021346 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) iQEcBAABAgAGBQJRgRqYAAoJEIXCXpWhbrlN7x8H/0bjpMH+InGLHDJ/SSbAh3Sa 7AB894eJZylokPLtXaI0XKemLMXUzYtpY992/eOf65slJr+pcqA7QMbVDJ+6UTeI wb9JfkWYSun+OS4HjTmckGzIyj/mdomDZhWfuPsNqqtfHan46uYjJjLWQVK9xiJq sG//72y7+KACuGUn9Kc038u7O5xadFE/iAP3co59n4YRd+T8VY7O0CB39BWT/y1L pwjVbBwSICIkIb2iKPczGnbp6+X71RJxGcDKPUFzxllzI2z3Bin26Bqu7d7sNk6E Ny9jo3aWhaMZio7kchcg8rGGGcf99ds3almR6fIcxVlO2k8Gs8rTw2cQ59m+uUA= =GL6n -----END PGP SIGNATURE-----