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-java-13.0-wheezy-i386-openstack.tar.gz.sig gpg: Signature made Tue Oct 15 15:14:24 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 16b3615da12c3961c6461a6cd856d1cab45e1fde * md5sum bbc8e0c7f4edc366146d7165abdc8eda 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) iQEcBAABAgAGBQJSXVu+AAoJEIXCXpWhbrlNDisH/RbpMYEbo07EwCDcKTN1TaEy lLap4UL/aQdFL9HOyCinXB0HGQmpxkscQEeRlSZWmyMQrGM9L8USnzyPWGZuXsQH mjz4GfMACjxgn+7pHGxXsbx/Rvkadi2Hjr+itKFlSPiIeLY/f7UXgc0RECVEycWn 2EqHfsO77Ba9OTpKbP0arYE1LNqq3rxrPXs13pt2Eis7qAH0r4n+iz6wZzCCQi/6 jeQzwiO87N08LFSMxFCezS25kfFIetXkHyigi+rCVAABt6FBkpJbG+H0ZniDTPu3 A+0ezGf4iFGgybUHclK2rnCxBMTOOG0n8od+G41zW1JNO1NktNKOrA+CCJHdr80= =KGVt -----END PGP SIGNATURE-----