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-appengine-python-13.0-wheezy-amd64-vmdk.zip.sig gpg: Signature made Wed Oct 16 08:12:00 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 0d07d255e7c537ed65b2c0d4790cc8140123b6be * md5sum b3882e7b9d60b941a73b9079f9a89e48 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) iQEcBAABAgAGBQJSXkpIAAoJEIXCXpWhbrlN1hAH/j0mlx7RfJad1sF50F7uUu7P W2O4ZOBouPZtdoVV6kwpEC3QmtdR12O9gG6J+dhP+HPIjzKc+dEk60D2/hxpuC5f Qrs24f30f+4Be8Y47PrZuf8vGgeQkNc7b23g47aaQ3PXu2AaKXDD4hswqYr8MuwV 3Qxwc2Ip9N40Kp2AZpGvp10QZ6msUvJ+Rk9gvegObjfTEAQbNcBvSOlczi25J+5C CRk7XSOW9vR29ggitIIHn+Te6xNfGecRXPKLrsUnPJrP1OSx6AhmcnaUj2McwS3H VeIHQmhlUnrGQ1HSR4pPv48GSAdEgO4FQFlg0t3Qtzb07YtoCnlCmbVD5HIn6Hk= =kwLq -----END PGP SIGNATURE-----