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-python-13.0-wheezy-i386-openstack.tar.gz.sig gpg: Signature made Tue Oct 15 15:10:42 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 00c3ed99df79b0820952e0393289559956bedf31 * md5sum a3037307288a0133732bba3b0de34622 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) iQEcBAABAgAGBQJSXVroAAoJEIXCXpWhbrlNdgEIAJfa4A4RWWDJKHXGoj1JT6EX TUrdqOv+mKTyI9BLvugEz2/tRAugEAGCZFAD893WCTzHJFPJwV3Cl+XIK8cylUO4 7VtgvtW7Uj7up2V/S3AAUNAZ9k2tsb3UqffgDNddn6bYfXRkZCZsSpZ60m8BelcD kqmmL2Vkj2X5S/bjMBzUoTDzKB5lLD8kk8vlOgIRQGL8RFGjQ6ZagY/IfGVg6BvN l9w+07wGfnt27TUQ6A58nHsnUknWl9ywKVipShVOowFTgxXyrp+GN7vYHEZzvxXr JGKmwm8ao8ee1vQCd7xtN7eHq9H76FIlNiSdBtnRnslY+5wjktB1HANh0Hu2p7o= =7oBS -----END PGP SIGNATURE-----