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-otrs-13.0-wheezy-i386.iso.sig gpg: Signature made Mon Oct 14 18:29:29 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 1fd8a01ca22006b0dde5fad6c5bd2a8b6b6b25b0 * md5sum 5c10c51a980b6903690d4e0b99d806db 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) iQEcBAABAgAGBQJSXDf9AAoJEIXCXpWhbrlNRZcIAJYSzRFJY+v29eQBWHhHWRI+ iABETCm4QZDF6wkMwl2HlNwR5K8ocQL7mD2XMiChZbN3gPt503Z7ysT86B4oluL/ To93rxlNLPqRFRnOJAC2eieidLsotZRi5kUKE8X+nJLtWk8FN23BCiHGedMt4MjK WzqonFKYtWouk98/HfBKJPuLnRjV+SqbBTAmXqQooffvPRHYE8tIxD5KWvC4siwh re5AlKwSuXfn2g3i0IIKXOcIsITGZik8VkuHmIHsg+N/EA+KCbt8KZtQuftTL5Yd rftQeS5wRZTiWqQ1Mrxf40ojqTojTWIN/23nAeFQhDLXSRd2mxtcGMJW6yLdbdc= =lT+i -----END PGP SIGNATURE-----