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-lighttpd-php-fastcgi-12.0-squeeze-x86.iso.sig gpg: Signature made Mon Aug 20 12:17:12 IDT 2012 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key For your convenience we also include file checksums: * sha1sum c98e5057a3bba11ed19b9ac8f01547899996e739 * md5sum 53f5fab3b298bf18bc8524986bb558c0 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) iQEcBAABAgAGBQJQMgCVAAoJEIXCXpWhbrlNMbIIAMnMY5TGNwg/80P5Jhoxky9v QIbJhE2qI1M3ixh49EMqAKmNogmgfdo8SgAXKrQrk0Lyfa2Yhaylr+NkqcUO3vzh hPNQoOasIa8/MmBjyMaZVmzAYOUjsVu2vWSzFyxKTM19MBkyYOioLMCKO43t5tCt xQani32jbKT9awvAZuHS+6hI0fwEOtCBGnrWtsQSuvB+Rvg/izA0O11qpMqKajKy 3cRHgRNEpJ7lr5qh4PEdAssYwXb5tOTBbEBGsKgB/DoGk2le2IjEwi6uW3BrJkdz R1TbwmzyAwpqHAhd+reWxdNTWzb+j8VpNRMNQJinTleGOHaSFMJADJyXk37QxG4= =NlLS -----END PGP SIGNATURE-----