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-13.0-wheezy-amd64.iso.sig gpg: Signature made Tue Oct 15 17:20:25 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 9985935c605f76e56c526b6ba74b0e63110f79da * md5sum 8fce5a374b6d0182ce43eb8e5570d591 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) iQEcBAABAgAGBQJSXXlRAAoJEIXCXpWhbrlNS9wH/jsUvXLVOocy91eCs7arvH/H FE8oqqKB4M00ME8a1uz5shrAIFa9njHpPuzJxd1hDCBLwGcXsWRVKwdgYVB8BPwQ nri/vdCw3Zf0Cd5GCn8H1OXbYrIv59Ju511g3jh6lyIYhmwhwC8UFIF6+B8BTJLq O4d2t1RiRqui63poN+Vo1UErzYeqat1te6u7TGfTcQRl6jVDpDNoem0fit4x8d1A 3uxdlQKEWrPdO2ZbeCPssVkZh5NKsCLQ84XBeRiWxozwQ30rgA0w6kMPrX9cGWZx W2Mi1GarUA0RDiHnMRVRRpz8nuWjqfwTVauM+epDtxq5OogFRv04QcI6p/C8MFc= =09vx -----END PGP SIGNATURE-----