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-core_13.0rc3-1_amd64.ova.sig gpg: Signature made Sun Sep 29 14:23:40 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum af61bdf94ae060965c8616b34851742415a34bc5 * md5sum 915dc70562910f41ad02551ca3a584a6 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) iQEcBAABAgAGBQJSSDfoAAoJEIXCXpWhbrlN7fQH+gMfLzdTVGhRQpsuZKE7UjgC i53kKPLM/PVufXbH1Y6Pl1PQqQD5w6Zr9Eb8lFuNgovUaGBQCHpFBHhX9yq+QGzs jZIUPuxJP9OAewU9vQesdWdRV6kjgu2RXTlS3GKa2c2VEngjMHhJe16K8fWtl1fn Wzi5R3XfMz28WDVQVPgjBip9YOYpehK3ZJfn98L+u+98YLWhNIXO8Ln54VlUr3jM WCRrXy0gsGVOOLyt8im719pJ/Qs32WOSK3Hs0/c1OCaQ47j0SmwHYfOPpHoFi8Ko MftEnpjc9dHyiGHEQITUmpgikfAh9Qgvlk+/aB0I8GGGug4k82ncnWXctxp8xdQ= =Ce70 -----END PGP SIGNATURE-----