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-mysql-13.0rc3-wheezy-amd64.iso.sig gpg: Signature made Fri Sep 13 08:32:18 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum db0a1530430183dde6d216e82ca0ec4723f35093 * md5sum fa02f1611596eee99d7847d257f540c7 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) iQEcBAABAgAGBQJSMs2LAAoJEIXCXpWhbrlNrs0IAOcje5vo0C8gGA2qhFnraMrM FKskBTp4QD3ssonX4TAca3Tu3ag1flQMeD11T8vWTJXTFg1LYTRQ1SwWrOFA63bU MNnjJ6hgAvRTLsX3Up9uHunZanEYEsQ56jORsyTYgia9FHvAImtCLZOxkOAX7jHW FycE0wSTiZ+ysSCQH2S/wSJNYof+q9BFWfKaR33YnmMtMZw1kHCoRtKKg+77Koap 48ltiqchjHE1KKLP79rlY/aDQcOkub302NS4KO0UOJOz40TdVITwNxf06BjxLcfR OGoVtJtqtEf+kphndIDBln6fnxB1OVbvK9vwGu5MiBJ9myHya3Ck1WnUTHhiW6g= =+pjr -----END PGP SIGNATURE-----