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-zurmo-12.1-squeeze-i386.iso.sig gpg: Signature made Thu Apr 18 17:45:28 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 9cf0c3da4cbcb190360a067316fddc813f4c5b63 * md5sum 9b129df8d5aafaf9a8187c40a4b4a880 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 v1.4.10 (GNU/Linux) iQEcBAABAgAGBQJRcDEtAAoJEIXCXpWhbrlNOfsH/1d8s8mm208mDSwcgjH78QbU tEd4iSl9oZkPW9xkKxhpuIR+fJSyBZh9/QlO0xN7bbyD2xreaFi52yg1q5hHHMe5 zwrByLIgNosBxL+3ApGXQTg8NOhKLV/Tt2ufwHD4U2x/lxMlU91F5VX55idUfJs1 FXeyIPKFc0DOiW/47sZV1n0TGeZuW0Dwf3XF4daDzHFO83m6+q7MeTcWjffYbToz vO+uD71i7tMpBeBza7A8etupLC1Lav3Oy4NOXDTlxM8H0WqoHCkOx/SIbdQ02Nzk xxeZ+xqtMoaUmvUnKZTAmal11HAsjqWt1DxLyLmNqHJPKI7lQkPWcXzLR+FqlWY= =Vn+T -----END PGP SIGNATURE-----