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-13.0-wheezy-amd64.iso.sig gpg: Signature made Tue Oct 15 17:08:12 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 989db7d49a011ba251f4ff638f8ec2a206b3ed4b * md5sum 5c044384a9e89beaf6b9f46146586d29 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) iQEcBAABAgAGBQJSXXZzAAoJEIXCXpWhbrlNED0H/2IpyJB0UlYIHi+inIU9Wqu9 vedjRzCgm/s2Z9XrI719iQkkOTz+Bjv+YvOAqhIFlKrQw7V7OEA1KmcKrDOhENgN jP7rTesp6QmP8OyhpTMiHgQGt9ttQfQ421mhaVw1m/lXuOJSqG9YcrMP/LVTx6Ku aSu6HnPSdVLYXxMnZ88N5Llo0da594tLFOX4mb3oRl9SAbqIuKfEn2Qguknw3xQ9 hbesmMHRAm/RR7PFQylbQNgtlvYJ5T+o9SMRAMQorkaLt4C4WbweqGrnsQz2ucjv BlShmi1JA9v2uiZkuOgsDbyGQ0PU0KM517Bn+g7P3hiCsTD2DxjYuaiuG48l5kU= =hdf4 -----END PGP SIGNATURE-----