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-moodle-13.0-wheezy-amd64-openstack.tar.gz.sig gpg: Signature made Wed Oct 16 09:29:46 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum c60933753db127085d44f7ac1be58b46b6d947d2 * md5sum bec10cf972a99fae9195d89ae9d8bba6 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) iQEcBAABAgAGBQJSXlyAAAoJEIXCXpWhbrlNrLsH/i70w41S7lo8k7q3omZiU1tG JTsUsINfSKmU+W3wqLCJ7p7IhyLD/vulyYjFTfcQVRhlKd0zTF0/n8DblwskdpZa W1BlkGJsTxVqdtChvUS/tTl5/xIvX+9TGTMSkoYUV0YtSeHBXSK1O4LJPD3j66aL ndhQ1Fn3wlXeGUQHpgIslAHKzt2nDgyNFzbL07OlflXU6xziaXnXRlDoyx2AQh1B o74f9gXWlAVKuqGHehMK12GY4tDOTcrYwEp86SkVyKRpX1m9a49a3MtRfoeWISwu UxwOL9juqbJQ5OpHf9WCld105F5nQwee9jofwKNFBGyngHWZwGW02xp11A6u+kc= =j7nc -----END PGP SIGNATURE-----