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-redmine-12.1-squeeze-amd64-ovf.zip.sig gpg: Signature made Tue Jun 4 15:46:35 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 7431ef9843a1bfbbb025fb8b0bab20bfc8eb13f7 * md5sum dd7e6f05d4095647ea15b4ed2e521da4 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) iQEcBAABAgAGBQJRrgvPAAoJEIXCXpWhbrlNOwUH/AsMkdTkWuJTXWv/sNCPqtyw szqcxosuEQUQ5N5d1MhfSspy+NaPWPqx9rsIzl/k90LPPEVpb8pyFe23S2Y/0cgN GjZV4lY4aMzdiWAVMzAvctw2c0gVOAQRqFlFIume4jSHfFW+bogjzI77VmYLBGr1 2LpDee4v+X+fk8TnBuiwD5J4pk3asSHSOAspzsqDqfu5Jp2pzlrQwY9Y7oH/ETJb lhKJT3cw0m8uAUrd+npJ9d5yihJdKa9PCD6HMQwiWG4LO5mohtJ8uqWsG+J87lpp lDvGqzgmRudXBTUBmuUT2lPmdHvtuw9ePUt3ymh3V7TTJZkRfpEYg3ewnI5WDFo= =zFdA -----END PGP SIGNATURE-----