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-domain-controller_13.0-1_amd64.ova.sig gpg: Signature made Wed Oct 16 08:23:02 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum def3245333a1f018d50fe827c425f71b360a288e * md5sum 6a3df4a7b5729e66f02cd0063d3e2bf8 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) iQEcBAABAgAGBQJSXkzeAAoJEIXCXpWhbrlNdrAH/2XO1jus8kkx4Drp71SCNCLP IzfY42xHxlkE2gzk06meWg2wgaY5UXKTJxagE9eP1ZontHVuftS6oEMMHqk7s9MH EG7iG+bkDdKF4+A9upnnK+LY0JibZKDOaiz2agUP9pRJlqzCRYwf5aCUzd8dWahv bin31rieGI13EQbNOjBVkc5bE/95tjcRF4Hm/qvKdSw+X0krcGgWR7vAZSkRmut7 ir1Ud2FwLgNvjOwjQr0DtjwH7r7c1yDuKlnO9U1FGmBGWNEoqQmmcLxl5oT0kIm4 XJypxi6yWEXSxUCRrzctb7uKRXL6oL8/cA/ZTD6pqL/uSjlkE33ArimdZbSUvVM= =3OpZ -----END PGP SIGNATURE-----