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-processmaker-13.0rc2-wheezy-amd64.iso.sig gpg: Signature made Wed Aug 7 08:48:08 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 7710dcc09e585cf2ed68543149cdbb2488aebf08 * md5sum f926c8f977cdae3ed1498757398ca0e8 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) iQEcBAABAgAGBQJSAgm/AAoJEIXCXpWhbrlN3TsH/3YYNvQBhuaFoXgYneiJk81h g0CsHTS9ycBbx+QHcsjWd+3Ixuf3BtFYGN8c2jQEa+MsYIDOpc11pRE0SsM30rjv HjYgTyXcTr9oJQtRVQkec5rdfjrXQvinKWK6Vjk/tluuW9z5x2QYAf2BOl/cUrAs ley6P3niti4rdAQfhejYDonRi1BOdjHecSR8StkTbatAQF4I5Vvntd9vQrBVQD8C EZ9IGzgT2+/wLmziZw2fecM+xhZnlsvYNZaEsqUqMXrwvg2DjZOeugmhDtFu7CuY yhScKZPe339bapIbqicXIVinq5mUeP8UBfVHk0RG1PckqYCoiJPirdkva7Swdn0= =AL1+ -----END PGP SIGNATURE-----