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-asp-net-apache-13.0-wheezy-amd64.iso.sig gpg: Signature made Tue Oct 15 14:47:40 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum cba82fba1ce240a046e1ec8eb98b8d5ae60c4a49 * md5sum d28dfdc0f3c625e1335221e96c532d8f 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) iQEcBAABAgAGBQJSXVWBAAoJEIXCXpWhbrlN81cH/RVKQljV6tvPXirjlg3yAKzS OeIBYbfu/5GBeQcVOlH3cUaTCCzA+r6D4IAJU655qTO0b4TBmwg7aUFkr5kviVb3 QxWojRQk2rtY5hASbDH3K8GugwGQ9NaGRVfN922ziJt/Wd6iubKUCVYuggMfi+ZH wdIDC3a/Dq8K1OUQCVd3hJEgd+P+twT/8++0p3EJpRVe6sLtj7tINROboBZ6sHrj L+1O9xtGPffH02ocfUoJExVj8/DiEaS2ueQZDlo21z+4oMnfYndiCvYXZULF/SUJ adnv872E4+deWpLBTADAnAY0vIj9kDuGB5Chg9w+yz7CKhvvYLWc55cqR62Wu4g= =+xY6 -----END PGP SIGNATURE-----