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-oscommerce-13.0rc3-wheezy-amd64.iso.sig gpg: Signature made Fri Sep 13 08:48:34 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum a9a37ae2e0af7a88cc7103cd71c2132b086ae693 * md5sum c919ce6ef436ebe5339f7c9cd02406a0 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) iQEcBAABAgAGBQJSMtFaAAoJEIXCXpWhbrlNWjgIAOm29/d3D0vyn4Wi12DUGmJ0 8xxKvE4KTB5w6XQj/x063nbMbQdmxjFis0jbaWlaknfvyTxNZnKl1VjNKU+GM4Pg RPIGf/Cb3A52qQVkvyiyxgbOuxpHUD8HugTUKS9Gz+n3y1a7cZs+8AJgpNLHiWwZ 2Me9LIUrLV7jIX5iMuBbwmUZZNOp2kdtb1KOsnLAHSItCuOUHnjPHB2LZlU9FabM 42Nq1+uhURfuJ4scy6DntoxLiIdkTedrfNrEuGfwfsvKEnG7kbWGHvwwnqdMZ+lT 7Tv/CWplMBF9Av2NJqoQKaG1vKZG3GS6dwZ90+zNCDOEkoLMwwLYbpXJBztoAsA= =UpkK -----END PGP SIGNATURE-----