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-mysql_13.0-1_amd64.ova.sig gpg: Signature made Wed Oct 16 09:25:57 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 90f6c7a8d8495979e90fae7c3b1fb27535e27d8f * md5sum bf3e09d0b9da28d3c0925a526c50ba40 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) iQEcBAABAgAGBQJSXlugAAoJEIXCXpWhbrlNjDMH/2YAhh7x8ljjwhpwx0Miv/G9 X6VmP+xBkOgDTdI3XYUxe3T5JCn6gVntD7dfbcvJJsuJWkQ4GKEjLbcXzgir+KpU rWqrVzLv+iwjRd3KFvs/kkIGDZtgFNDMMLqw/3Xu58Pkfun2hnRx7u66/j7A5yt+ xKYX/3syTQap9UVWXyoI97g3Kra/3kX0nR01p1/L2Uk08ojv2QOozX3bxB+ylG6j TeuhuKK45C2Jti457rml4C62C2UWNHyZGXCu/MF98x6g96ka8M4JdiyGNb4QgwHz AbMsy2MhS3au9YrvNZdfQWHeXgA2IRLKAWtr08AgbNe/kbzpUaCakZVZx0QH2v4= =rXIe -----END PGP SIGNATURE-----