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-13.0-wheezy-amd64.iso.sig gpg: Signature made Tue Oct 15 15:18:36 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 0c7c7a033d5bab9450855c6d668d51c7093412c1 * md5sum efba15db772a48ec236a22850e5610e1 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) iQEcBAABAgAGBQJSXVzBAAoJEIXCXpWhbrlNYAwIAJtcSek/YB+DoDWbpsVTvSXv sgc5yaVxSe9jOsFKb/SmvLAs8TVf26+yVe8ZOINN32rl3jYXIbePah8F6BNlDkKP RU73Lu9PwgAYA9Cz7+If/p4jkk5vSnbNXeLqNwSiDoxabvddyVHAKZdo7SP3N36e 5QTIAwlVYxvjvu4IapC70m2I7WnaN/bNotHSD+PMswsxPZmvtvO5yek27Y4t34kt gr9NRqcBS5dxW/mjWF+E7v/J+Hht/d3XKxlFHMJWQE3i8DSfEq7IAI+UgJB1cLS/ fDenQLnkhg/QTi47AbTa8r1rGoKM/TjG3FyfPGxCm+8NntWvP0T0YcFcKRZLIhw= =gmuV -----END PGP SIGNATURE-----