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 <release@turnkeylinux.com>

    $ gpg --verify turnkey-punbb-12.1-squeeze-amd64.iso.sig
      gpg: Signature made Wed May  1 13:35:10 UTC 2013 using RSA key ID A16EB94D
      gpg: Good signature from "Turnkey Linux Release Key"

For your convenience we also include file checksums:

    * sha1sum  4ec0bee3f48da24d8291f50c4257416f1c88d115
    * md5sum   1623f632c9461ce1bfe78fd3381b004c

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)

iQEcBAABAgAGBQJRgRoFAAoJEIXCXpWhbrlNnbcIAJaREcGDVNEIbwxlD9h2FiFC
0DgzZFvI9cv35uNFiUEXJdvSoHPoSiqngRIFFee4l8jG+OwOUzOaLkLcbK3Es/wE
SpKD7hZyCINwJl4iDO/LfjwO8fK5Qcm3GXWH19ZJ9mh1iTH58csH2wwaSfsurMV2
G6omCED1Mw0gBx4Ewc6dPzr+D0xZW+QJ+T0bES53KUaUQeenqJHfE6klv1/eqr0V
OwtwsQopGJc7JINjFowcj9d2cZRtH0v8E8lINlLYOGe5aKcY1k15zuqOSbaz1vbc
p+KoKmtChNAQC2sM0IKV7yZeFZmrJ1s2KUJYrxbDuCQSS+x/MbN2qJCvot1Zj50=
=lZWd
-----END PGP SIGNATURE-----