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-6-turnkey-appengine-java_12.0-1_i386.tar.gz.sig gpg: Signature made Tue Aug 21 13:30:51 UTC 2012 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key For your convenience we also include file checksums: * sha1sum edda1cdc26840b9d8942ae0464758c40349ee854 * md5sum b8d7ad99040568b1e8897e3febb14f75 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) iQEcBAABAgAGBQJQM416AAoJEIXCXpWhbrlNKgMH/j2JvceI2+gDX3q5Hff6b87L MZK8ueTeiJ2MP1gxR4v2PiY7Du33OW1QaemavoUbZ81yhrECWqmVgdQLoOb7aay1 VzlZP9BALa/rTOK1/jOLwSd7s+qUT1PWkqWs/pe2Z9iXNsWvpO8rglWgR/1miIp2 znHzu5ts7QO5q7eaTEh08a6Ps9sc5ZKsI0/xIAhoqgNK/6fa3uhvR2s5l69awtHV Bh0DzuRZMK9uuuFNrk3Uc4pnLHQesyOJCPTrmu0J+sIozC8ETLaZo02uDkBUq7rv ZpFA3cMYlStWfzm3SJ7rW+wLvuhZFUQ3FNdoa8tpSpZcEUW7mLhzrVfCATz8NDY= =JbLV -----END PGP SIGNATURE-----