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-moodle_13.0-1_amd64.ova.sig gpg: Signature made Wed Oct 16 09:22:31 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 0686aaa75f48df002f8fa1821c6e8a6f152dbf3b * md5sum 8cec4b34557ffc91097c913a22231c9c 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) iQEcBAABAgAGBQJSXlrPAAoJEIXCXpWhbrlN+g4H/05pQ5Dyx4SpZsxJWL92ga2Z SrAYg7KrwXUdIf5AITNX3mztP23GSRUWcwl5xYJu8KQfxe2v+TWUXTOVDR4j5tIz g8lHOp7VGA4y6x6Ug5Qz9siT3o8ya5tI9+7/Fd00Ok472buumMoUK05t4kQWf2hZ gdOTctN7yilzeUoU87IHKCnoEepN/ehhLCjrJLImlxJrK7XXfAZ8P0C4R56Z7D25 ViwGrtwxfGrM9te/mgMdY6eaLqGj4Qf304dCW57nIoq1AWlGb4MoCPy6HtgEq9e2 v77vxUncTVtsPGmh6jWEeGj9qZnHbFFT3+0gP6F/wAsPYz0gMjZvJSYvN8+qnY4= =LbYb -----END PGP SIGNATURE-----