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_12.1-1_i386.tar.gz.sig gpg: Signature made Tue Jun 4 19:56:49 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 80d4f4b2e7c8523d29d933fd8934dc3fbf777a2e * md5sum 389072e2e49e38caac30861958686130 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) iQEcBAABAgAGBQJRrkZtAAoJEIXCXpWhbrlN64oIALPT2G7g76mPcdYLkC5c/X0N XvDpmZIZIw+mEoC6V2/nOiY82aAKKks18KIn93DXtZrMcY2DOm3mIEOy7s7e9Erl e9otUbgqrWSFW/wcyVtpJ9K1vt22/FZqqLj89nSmw3Ld8iynrxUN6d6MvUOMtv5L c2yIaFFrVP2mQp9vkeAIHve4DEfrG3iAk9l7r64mO+LBGfuhfwv6GEGoIayKR7HL cYV9/B2TXdnbSngJvzo+h+z+JnnWYPetLCR79pa2SSvHoxZjFBxYGjXCp5ufEUTl iPylZO1aZARJGsAmFfPYOT1RIxXXciSsXlIISdOFeNbthLD0sC079xU7N878tvo= =YO2x -----END PGP SIGNATURE-----