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-oscommerce_13.0-1_i386.ova.sig gpg: Signature made Tue Oct 15 17:37:20 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum e345ca5fa0d13d3bd83d5deef134e2d07de6b11a * md5sum ab6ee1929701470c78f8fc293a9ae1bb 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) iQEcBAABAgAGBQJSXX1KAAoJEIXCXpWhbrlN6mEH+wfyOEPExQXKyZjGXp0i7JY3 h1zrzKjRHH/EgBxfBGD2ywydOmK+ChaZTqtaT0oSi7i3I8Vn8KEJ3/+XQ4Jnjotd reRg1V6Be4ycE7E5Q5ngi1RXayFhx70tazNS1uVYTtMWNTHb5RX0Vywl/T3DJGUo IWYYKTWr36QEo0PkMk6ouXa9WcQgH8zu4WAXQedefQnzcG4AvGs3b+lJaftPhSpg trKGLLaXbZgzfp2RiwVVphm4JUFRX/AVvcQxCi0UVsRYPX5q3apZBtuUYy/wZz2i OqT8qHs0Oqls2VrJdotqkTbv2n7wd+dqUmniJirmifR7SHw5ozEBQWJg8IK+9jU= =oeAC -----END PGP SIGNATURE-----