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-vanilla-13.0rc2-wheezy-amd64.iso.sig gpg: Signature made Wed Aug 7 09:19:44 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum cd175b8004080b600b224eab199a98de5d35ff49 * md5sum b3fa0d894b51792667f9d6accf106f03 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) iQEcBAABAgAGBQJSAhEnAAoJEIXCXpWhbrlNx6gH/A1qY7CqD+GOdMkBnwSLoS2X 50rpJGPeQoW2pbeVd0qTNhEWtgvYWjGqigzVoesuV7cnaIxXafWPmDYPBiHgrM9q rjF872OeXVGYfbRqkaoCixAauP1TmzqoRaJWuZpT/nkyRPkPe9FOjrFez0DAvKRG ivs+m7UtAyckcZuTmSuXMoDY0FZPeLqfqYtCgGx1SK933F5bcS+s9+YBtQWxQ49C ET36tyotvD/GMQFtrmSGgoVKpqQUboJfpsMdsImGw0/MTI+pE1v6P3QmjTRMBWEL WYPbWfKagHkiLeFAiO2mVWfRkBmgPkU/bzDe2dacNGddtBZAyICGKoJMk7aJgJc= =yDgL -----END PGP SIGNATURE-----