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-gallery-13.0-wheezy-i386.iso.sig gpg: Signature made Mon Oct 14 17:42:10 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 2bb0e0d58f43e6701f50f9a67e6b01d3aae42de3 * md5sum ca309031cd13d8e94287bc06e361b66b 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) iQEcBAABAgAGBQJSXCzoAAoJEIXCXpWhbrlN9+oIAMTP5Rj7ror+LelvDMod7ujX fdVmYiJjxWsL6m0xOuEutUgz87yy7A1K063fkzM2+yIIU1MPdHJ1IGrKrO6NHf6r oegq4XAqIb78Ra6bzP+XeQCsh8CY47qtCCEbMv7qv54fTRjNyiZzErbNEW0tFlsf s+H2q/oZYJRMErwtrqH+1eCUbAYsMH23RrHPTdP71zApAXRxsTa8H8/UEpvO39Oo MGAKsBfYvQAiV9HFLMCXqeAdy4vlJE1d53dcDFcXEJ0J6vNyexzfHZJvgZAn9uus eXN5ybI1X62FHHUUxyuEisQ4J0iN6/jyDb513qWckOy9doQFr8/iUQ02N+OHh8I= =sgrJ -----END PGP SIGNATURE-----