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-zurmo-12.1-squeeze-amd64-ovf.zip.sig gpg: Signature made Tue Jun 4 17:08:24 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum fcc617afff072ae2c632cb4b5979017574174f0a * md5sum d7f739db3a9f366fec6552178bcdec69 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) iQEcBAABAgAGBQJRrh7/AAoJEIXCXpWhbrlN6WIH/ighmN3qgUfp2fVnvbmEj0K0 J3Ve8I12aio7F+lceeHupjckVs15v18RZDEbnq9DvaUkPiLpyzvCcQ9Y9TZplWlp cZqjUMy27YU8bRZzVbFJOyVjHL6NEVVqppasaprWGTsN0TeOEKduK/kkYj4LcnIg r7z91s3s9SS2V69TMFzHdQO6swu7UihC1uNZRcp7IliUyXxpUJmVW9vUzYBQoXlJ oeTv5oM0UkLlyGdS6XeuZOnPTuMXksxPMoy1uCkj1qje4FrCvi48LeCeqa4XXqub 66QSuRSOuAm2ATfmdYMXKqMu1ilbnHGfXmLBjwDF29OzNCMDB0yC3QEwhWzaxis= =K2d4 -----END PGP SIGNATURE-----