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-12.1-squeeze-amd64-ovf.zip.sig gpg: Signature made Tue Jun 4 12:22:13 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 49432b3d15e07307ec64b60bd25bfd35540d8de4 * md5sum 16a6cc070e24fc718bdc5d3d25691b7f 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) iQEcBAABAgAGBQJRrdvtAAoJEIXCXpWhbrlNQ18H/2h5gCXAza2o8hdULPXfiork LslCRJX+VSUeRjT4qQijxyoN5dOJkIOsbbEyY0JrALbZYDnLpOqBmu/YOiV7Eso7 bPUq5CYDJwBiM/+Lxtu01m63oAgrp5RogDlhbIr1r4o+zxmem+eeex4oyDZHV0bx yHxohhsKlBe2t3seso4SBWw/8R14QYyF3feFZElDUB+yID++aMKJ+pfJtdgZPpn2 i2+ucrxHhjHr/O4ijyr4NJ8OKqxXtQBlMdpKUbItYyUB2SoAkQ00WYrc5h/GsfUz JuaDwrGB9BCIVuRc/JFck3nrzmoXL9tFAhSTa07lFx6WRAi1O0LkQSV+Ga+7CSI= =s4Sb -----END PGP SIGNATURE-----