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-ushahidi-13.0rc3-wheezy-amd64.iso.sig gpg: Signature made Fri Sep 13 09:39:18 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum e7c43b830efd6c6c5172bf5361c1e7b6025b033c * md5sum 81c490c347b72fd690b5c0c04c726c4e 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) iQEcBAABAgAGBQJSMt0+AAoJEIXCXpWhbrlNWQsIAKpkI0qsbkK1Ti7C8E39QCNt DgJRQcAaIQxepJBvKef4kLzW30aX/xiEgxgDPvyshJzpSnQlfdSf8LFP+vSmLYoy PZL/jMPNIhL0A+npndSZwMkNCIdCoVSAv/jK1cWn5HThx4KTp+j3QoKhL5mRS9uW O+sDz4R/xTN/iO9dpsxhBR94Dhfz3xAvlKccqQ/Z02ZpFcfFzWg+ERhQX8K22wKp D3P7tDf5rZK5iZ/eEvmG0ym6+FLM6W903veopZ9uNEXvTVQCMdcwHUDyCsrCUxyn 5unK0g2ZiYB888tQe9JHTS/i4S8KIgXSndDbyjhg8VSwoX6WPcYAwlylX5VM8r0= =tjTb -----END PGP SIGNATURE-----