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-revision-control_13.0-1_i386.ova.sig gpg: Signature made Tue Oct 15 18:35:47 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum b6e219bc9d4fd8253cb2939270f7f9801f3406ec * md5sum baf49417c2705df8bd0847fbb061f6ec 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) iQEcBAABAgAGBQJSXYr7AAoJEIXCXpWhbrlNZbMH/R8djTFNSCWKZf8ALyr5pB+9 p3dskOD74+daATUyxqquBt+ufvhRhtkmVyVKgQLdIeZbPwqD7BNurjQ9dI21MvAj H4pzJ+PYcYxBWsVhwWsFz34mWWFbS63z8oQ3/uEGK41Bl+oG/zVG4Jj6FcUoxYfA 0eLOI1dYcJokUaig3sbGMyf2Xgi3oIwbUgSBZF59u/TOyieqKcbmlqOP+l4CT4+I mdM5sGk19z5iYCp2rWTb6awBBYLuDRwTirJ+ZMCBXcftxi40524zm1SkbNA1KCSC 6PBm6DqrShVXYwbXLlxife/5xwUeQrTdAg73435vFg96qI0VDZtfPI+bM+C9Na4= =2K2J -----END PGP SIGNATURE-----