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-ezpublish-12.1-squeeze-amd64.iso.sig gpg: Signature made Wed May 1 12:38:23 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum bcc1115c98ddbd7bebc51c1a4fbf6ba4cfb00c7b * md5sum abd3f1f21b134b7b248dee22a9e20f18 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) iQEcBAABAgAGBQJRgQy0AAoJEIXCXpWhbrlNBBIIAI5KNGMkzqYbfT2ZC69PMzoT nzecNtCCz2J7yJAqE5Pt6LVhC6wDWR+nIX9C8DFB+c1rlEhI0UGrIiMPh1qOB14G qPayhl/ylI1MERMvMTiqBIB7DituqM95f0PAuvjgNKvflGhPzicMe4JhY2fbxvgY QvgVg4C3Xchb4pq+iDZoLnkoVPwtTRHC+OOOOpMapaRnhxewf8hkQssiolbiB7a6 KGMaCfGv32rWSd3qUGUz1DVo+iWfwRedar7PqykA+D7BHG/08ZIm7eXLycMjikP2 3Hr4NdMR0GApscE08sxreimFsoI1dXzcscBZCwJjpw7yLzrSevvP/u6W8i2NAko= =30K/ -----END PGP SIGNATURE-----