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-appengine-java_13.0-1_i386.tar.gz.sig gpg: Signature made Tue Oct 15 15:05:28 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum fd26b0e6c547973e62c813bc4149b63cca6bbc2a * md5sum 4f0e7f7a16d10ab18be0e7175070216d 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) iQEcBAABAgAGBQJSXVmoAAoJEIXCXpWhbrlNoYgIAL4Uyu3Ur/n6TerRCmqErbBr uy3mFSSCPXRmlj7p3RS3xmYgzRRS42sTRb3Ks60+6WfHBKFWHwMdcJtF7hB4KU7E Cg7nMJRg9V7f57+PBxXvLcEuLaqGUvLonSssIhUgij7rgV81f5flj4u9DdEU1USU Uy9L8/DFD+otJdaGUbDPc9sVlMiNdJSqRy1C3OxFIdc/rVV3wJgl0WOrnF/1pwVn PoqLBcigzAZrlqImopN7H1k3fXtKpxiRO+Ey2pme3zsXfpDXkuW9RW3JMAZENFEd FlpLHV3bdUGJaKzQftZ6Yj7QypVf3XYEZbZLSsrJI9934zIiUT31kLWwBrw46nQ= =uXV6 -----END PGP SIGNATURE-----