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-go-12.0-squeeze-x86.iso.sig gpg: Signature made Sat Aug 18 16:53:59 UTC 2012 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key For your convenience we also include file checksums: * sha1sum a27ad0ddca80d5667393254be53ea6816be5cda2 * md5sum 6d213d557a557e44893f14b0ddc29147 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) iQEcBAABAgAGBQJQL8ieAAoJEIXCXpWhbrlNeZYIAMnPht4lVp9WLrRUmRD5l8/E JLWPhy3Vv/iLSdufUwrj5TFJa4AM5c/NNycbv9fQAPaS9RBaPeOzsY2em5yD8Lfd Wdy/8mqrM6d/d04ShyuMdNhot+8ul5IzI+IjcG48mXxIF4RZqVLuyuy5d44Nxra/ oQwLMjwD/9dene43ns0VaAptYsVf+vhw5Z4eUmMRgZlppbpjj5xkgYwEnwpL+DyF 5xspLw8C8DZZGtA6/iz9DTKvLY7bLwhZ/aGbcOCyR4NNJfqzhgBZGxPYxU5BIOox 74NItW306v63gL7I7GyGDe+Cpg8s/YHjYe9fykVb2zPcZxKgHsx/m3GaJmjnSVs= =LaPB -----END PGP SIGNATURE-----