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-redmine-12.1-squeeze-amd64.iso.sig
      gpg: Signature made Wed May  1 13:48:35 UTC 2013 using RSA key ID A16EB94D
      gpg: Good signature from "Turnkey Linux Release Key"

For your convenience we also include file checksums:

    * sha1sum  803f4b34e35c26489a9d71feb925107cfe50f6ee
    * md5sum   ab416c079aea02e9cf80e1d356f46e63

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)

iQEcBAABAgAGBQJRgR0jAAoJEIXCXpWhbrlNbV0IAKoIPBWt7xxndHVqk0xSUVNa
Uylydl/6cHRawAfH6P7Sg7xqTdpiWuBcX7nN1dMmWWBW9B8FTjruWs+zZFGcgBkF
9Ajfguy/C8aMo+29mZYC5EgeBbAfebiiM0WNVdSvyX4O0K19QAJnNMl7LZLSLG+P
OhIs+9aDhWREohN2m1/Bu32e24ZGAauJpo2/glhcowPSv+O2az44GmqPH8hi2cbJ
acj9QIt+2qdnA0k97bocAM9dczrDrxURXnF5fg8Mu2vfM140shqJLzs++os4g6hZ
ovJPaNr6zBqZ2Xnk/1J9FgOu8neJwaA8RNiznKfui9YNxqAk1efv5VfwzkINK1g=
=V+eX
-----END PGP SIGNATURE-----