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-xoops-13.0rc3-wheezy-amd64.iso.sig gpg: Signature made Fri Sep 13 09:48:11 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 64c0824a378bfcd16ed2f5b6896e823a2045b163 * md5sum e9449890d439654303f9fa0650001a87 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) iQEcBAABAgAGBQJSMt9TAAoJEIXCXpWhbrlNtCwH/2RkAQDmbjwHD6ONCSACR73U qwguKrA0nnkwjqyvYKN4KpmtIwlNos2hV/kQ6s3H9oQ1XaPF3ToA4+/26xz6+7Qp nFJ3N2E/OrRwhs79fZjTdnqg9tFOnYS77RLQpEQvXhE4hJhYmSCerjD3TS/lmyWo kOKg7/3qxhebFKhtYNMfEj6uFZj5wHP6UycoTYr82L3T6mWXl/6Zx+CEcCCb5Xa6 M+6YzpaIJM++lhh6M4IieowQnxZhcdZZl/Z9CQ6VRHwSdRYVv0wrCgfxROmnLFUV y2iaDYp+pL+/0w4pnAkuGWrvt4hH+4TJjT9zht/MR/baL0nhzONCJrYBkv/oR/M= =aToa -----END PGP SIGNATURE-----