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-domain-controller-12.1-squeeze-i386-openstack.tar.gz.sig gpg: Signature made Tue Jun 4 20:43:52 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum b100e3cc08b2df741d7e137f530a935a4e87936a * md5sum 70052c2d91063c00b351bcd2225184a0 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) iQEcBAABAgAGBQJRrlF9AAoJEIXCXpWhbrlN9h4H/2d6F4YCsfT5LCzK5RFh/gbG FuZ0xlz5Gdn+OFrzmsCMQ2TUpVr3tc6JxqJMtcImHA9IDWiLT9guOCHty9Rxa8pC txkhIbXOaefiNXiyRTT/HJbkw1n40ptznKctf4Oum7btaxjugGJ4rTmS7zk6j7lZ cu39HqAaut/NYiQcxJWCZJvpTVIOU1LG76iLT9SmSwJrBXSYzdQ4GGJC+l7gbC4p EC0hB0TLI3BVfrpLHKr9XPkTxl/snuMcZyWQrU/1uAml8IR/guVLEFxHGx6VnE/3 s0dcWeMMoDDch0Au/l8laMENbg56J5oEUYU9pUxuDs5P02ygfxsETA0E/5DzCiA= =vVSA -----END PGP SIGNATURE-----