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-phpnuke-13.0-wheezy-i386.iso.sig gpg: Signature made Mon Oct 14 18:31:48 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 98ea9381977d79f2e5617e230e74d003ebf2c9f6 * md5sum d1de56267743db3ae99e859bd8257a63 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) iQEcBAABAgAGBQJSXDiJAAoJEIXCXpWhbrlNJp8H/0b/JMgs7Ic6fOCXMho+KLRE 9FS4v6CP8tXlMnU7uaxB5EifW3TRQnZmCsu2SeB2FjWf88lwxr5hI3ShvY8vg85w YHb/O/AyurimVeZ5rPVV+/hpBq+slypVRklBrbQXV226RB0y5ftkvtglvyUD4JYG ii+cQXGHmKlLDt2YGrFCBTunB3xLInmif0CZZ4U88DUScgyhKDhexof2dmvcELzS ZxGFpgItPKiTe0rlZgEHI6vbUk0tO3L4P2bKRZGvNHVgCv0PGgsvW66EhvimEf/Y dXxcPAfVKH7zpmSkkPlgXCy2/M3Um70PQDFLcfrrRSRmHJR/jScbYvHcuSz7eWg= =Nh9w -----END PGP SIGNATURE-----