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 turnkey-nginx-php-fastcgi-12.1-squeeze-i386-vmdk.zip.sig gpg: Signature made Tue Jun 4 22:26:13 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 906735141791a68247ae35525b79aad7878270e5 * md5sum 5891f683d09f63ffe041153e739d377a 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 v1.4.10 (GNU/Linux) iQEcBAABAgAGBQJRrml6AAoJEIXCXpWhbrlNn4kH/RtQPZ3Fg4nxu+svmF4iRd5Z O405FjJtN6rkaRnuusUrVuBXq2FeYi7uKi18VxtsvDllC02+wjfuZFHV26NAIq2K z2KtYd6MasbGwQxeNOTZUK73kb86dMUEkdOtkyfKs7wH2Kmhu9u8qCGmr04j1bJt 4mmoCEvAXJjJ2NPbPAnrIVO7U9YISTbBkf6K9aoYN4E1rsUIDe5vXrWVqJqwyvfN 0tyIq+bzAl7ZtzELBcHmkqUw5C5L0wIYbL+vGUqFNTLUwJUQYg/RKJSZmOLiYMAj 05fsVXyFN7Y9waWeBqbkQMFyIogFPGUEVoazCK0NrwBg4w9Zg/SjyNwBgSwR1b8= =mpgU -----END PGP SIGNATURE-----