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-mantis-13.0-wheezy-i386.iso.sig gpg: Signature made Mon Oct 14 18:00:58 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 41f9162a18525213b3f6170a5f8b71f8ab2b595d * md5sum 608cbc44d084f4c9fe59a3866f9110ff 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) iQEcBAABAgAGBQJSXDFPAAoJEIXCXpWhbrlNcvwH/2+9OUTawYT0XgtphGVro3pl rJh4FZQqcITHcstJln85qNECfXVnbyhUJHkg2N2b5VwPVK8WmQG2Vs8ey7D3US3c 0sr3to3g3X4OlD7aXztFQr28y7qsZSZwQMewIMUbyI66qCyOLPCV9UZw5rJFnqUY GwW0292F0chMYqerKll/HWiZne0FYlzAYM6Lbm3bv+jHPNBu1ql+QzD2wpG+EPya D90aLlJ3AqaPw5lF5c3zJt/tal0W3rDppaNW2+vUK9ZiF/Uv/9F8q9kqczxzVOmW PwXDjTpLo3n75DjSolLVzSAivpp2sNh9ue2VAVvddiQRwZmyL6+F2P1A4JkGWGg= =VEgS -----END PGP SIGNATURE-----