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-ezpublish-13.0rc3-wheezy-amd64.iso.sig gpg: Signature made Fri Sep 13 08:03:34 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 869fb704cda328ae6daf5e7920f62ddbaf8f2a57 * md5sum 081b65626837dd33d312c2f05071315d 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) iQEcBAABAgAGBQJSMsbNAAoJEIXCXpWhbrlNPskH/1xge/QxUgIT48cYHZuz9AJq xhe1OJQAOD0Z7fyGqoIsb7eoNjDgCXA6ndOwQ4PBvCP3WjdcKCas6ljW3D9T4ovK ijXLiItd9g3f0e8Q9l+oWKmxFNdnsHj/CHVxFEz+qC3mekUKKgfWkShbvcw6iwJG M58htHhortEjOyqjCxfAYTfgvdMbCsCsjSMcqE06iL71eZSCmg3hoRIXmuD8/nqt Z7v35NOK50NJ43fDz5TqbvgXzDcE41O4S07D4dKE8oyMsQ4ijbgu+dmCFSLOdJLv Ip8velpjA6xJ2HDn9IYaYjrC/qsOGha7rJPIF1N348Xyq6cEa1DathKTidmup7Y= =NMiC -----END PGP SIGNATURE-----