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 debian-7-turnkey-tracks_13.0-1_amd64.ova.sig gpg: Signature made Wed Oct 16 10:46:57 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 431b1b8077bf039832c53817a75291569120db8b * md5sum ef0428c77dfed3ccf9217ff69d8525da 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) iQEcBAABAgAGBQJSXm6VAAoJEIXCXpWhbrlNnn0IANHcGOFJvRN9uwmZ2AvT+ET6 Fn/dwIIjOVjf1hf/AfKYLRii9PD4u6zK7KzD+YsjxVaRj7j9Y7BnXpymwjdH9jFZ 07OvnCyFM6WqO/Sbgeff4+oMOK3yZyLycoyrfYWURInBvt8W76wtMJ/UpX/oS1Xy J++3Kb97yasJxiQOuAhrvzC2CsF8evAFg236PtG0+K9qDAUbdHvOiGCFqo2j4HZu NW+iwy81mEgmUB8VnnDnOp5WuTF2do+p/4SC86qOObCaxeHpDF0yq+AUnqjZyICL lKrlZQG8jCab5x+WaWQUI+iJRTsQIQ1BPqGsCHkT6r0Kuo63Qzj9YquObUJD82E= =1nQg -----END PGP SIGNATURE-----