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-mibew-13.0rc2-wheezy-amd64.iso.sig gpg: Signature made Wed Aug 7 08:14:57 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum d8b93162bb67848de69d6cbbedba7bfdd43565cd * md5sum b6e893ab524c1693f26c81ae5410341d 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) iQEcBAABAgAGBQJSAgH4AAoJEIXCXpWhbrlNAb4H/Au+51Rik4MdtVfYiQNBymUq Q9lPqQUlytZzHJnPH30+pOpkMVdjhcjZMT4Oubd4qMM2nhrj+oX5vC+fjDa8oRbm zzTeeHouc2TVkW7GriYeKQ6KyAajfjbC5NV2QJ9/eGqrcE9XSdUn4uRulOzJ6reK 1AIcmbORDeBZB9av5osxuiYiUR/pAi1GdAZGAp7rLN2FKV8+odeGlLplsUU7Lmqj +LZUNuv2seAXifMWUJkQ9HguRZcm0gQOd+rLZjW4oSE2yPOIBNz2DKkNcXcekfqr yRXA+8FlHIfmP2wAO/Sa0uJE3v2jyjRh1NmhqWaGhg85ciMC5hceihkKsc90JYM= =yKa3 -----END PGP SIGNATURE-----