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-lighttpd-php-fastcgi_13.0-1_amd64.ova.sig gpg: Signature made Wed Oct 16 08:55:55 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum d759ecedf00a0cf747067dede2cd5825a1b3e6b1 * md5sum 860893863318509adb883b6c073c2b88 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) iQEcBAABAgAGBQJSXlSWAAoJEIXCXpWhbrlNEIYH/iQXh4/fF+Fce0eLuE5hxICE qmxHQ9oPQXV2Kw59LTVk7AzQRXbrux0aTU2MQbL39+I2c8ZfjFDilGpRTanjdw1G wzNJKWjstvVRAPLcSN6+/bZmWH+mR40ynCrR1SYJWPSDYLTf6kVqqNl0Pu+S/qP6 h4RqsF30IIKP9ISyUgIz6CY/QVJgEYeDjQNdXNUD1kuolADOoLitm3CGLlhmip8r 6sgzUPz3UNgjHeIZMVcX4tyoDqfwJ8MO+vQpOtcvKQZHrbZDGBiXidOsh9vU8lD/ ein9r1ZCo/D8DgG8Y/CMliGCP64HNFKd6tRddmjFl6mAioDnkrf+J1MLB078bfE= =rfVI -----END PGP SIGNATURE-----