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-moinmoin-12.1-squeeze-amd64.iso.sig gpg: Signature made Wed May 1 12:59:51 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum e00681639eb7be03d644791e0301266619d1ddda * md5sum c8087bce092ffc5899b4e9e7699a09a5 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) iQEcBAABAgAGBQJRgRG/AAoJEIXCXpWhbrlNmvAH/1N9j5h5rgL1v73Nwo/d4SVt mb/FQMX+Bgs52QhGOX2MfOIr7GJLMdUoIgLQ/JFFO4HmuzMiBanI5g7KhmvanHiA FEGymMUPullWLyHwF6/22WmVTwiPzUi7sNW96p/uh9DpdxbaQNG3g26BXXdTx8ZQ A6zvbF96ycv7dFF6/p+OvE50bys5BzTTYzOow50fm89A1mYRc34CWWcS3nkAmb2d gTueTE4kPI0kr8xa1MTl0aKvGbl4xE+JzvQJ4IhGjBbQOBDAHoAPPW8OqmqPn1Ts I33xZWE+H6/qQ9vB/RMXSc5SIvR9iYwlfONBivbsjKEhLJyx/f9TBsW1GIdYR70= =Iazj -----END PGP SIGNATURE-----