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-oscommerce-13.0-wheezy-amd64.iso.sig gpg: Signature made Tue Oct 15 16:04:45 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum a91d5dbf18e8df822bea52b9c95774d5994c5206 * md5sum ee997112db7045d6c65a641ed0c26c35 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 v1.4.12 (GNU/Linux) iQEcBAABAgAGBQJSXWeUAAoJEIXCXpWhbrlNPAUH/jXDnPegMa2oTA109776TUFW PDLTmpZzujop/dcAIfJfiUoKe6MUGPFnQyrk+jxwUfCktKfurRZhR3XYX7quGWH8 nT4VgYIEpkPZ2lWkQMj0XOzFlSQz0hfG3uFnukrzuO7l71p97JjeU47U161+pB9f Vd7eASEUrYaMWZUZ7fcSsibX0eIOJtdZr+S7Dj2m+wOMom2PCxLm64VKC6hFnkre JB7OqStHh8clN5V3rMu/TFtpnIwpPiyE6MCsbN/t7qa9EAzOa8auH1EerJ5BOOrz jghskzmHykswVfhuqbv/m3/c7VlnsIVDFj9vy/d8DeBdd6OwQeT1JUFjAp35Khk= =79Ba -----END PGP SIGNATURE-----