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-openldap-13.0rc2-wheezy-amd64.iso.sig gpg: Signature made Wed Aug 7 08:21:57 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum a77fa2c9cae4a1cc45587d6e46257e717a3ffdd5 * md5sum f4b9d98b6597fb2e87210dcadd24923b 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) iQEcBAABAgAGBQJSAgOeAAoJEIXCXpWhbrlNKz4IALb3dM7/0ME1bngtCte8udeo YuxBOeGoJzlyCsZxQ5h/0Guf0oxeCddenc6Nxr8K+e4KW3Bff0p3WcdloDP9m6+j tAJjsfmHQHNSyMsvdR1Ll51oh0sfdC98bKIdHw1YE1lOOu1k2ZQuA7gI1f8YGGAR J0NfZjGk+5918+cn8GNqAAPSAf2/JcaSiVWsEvYPkRAjsBesC+2uzqtIPwszWwyx UcCsKLMGG/S+YlGcqIKaz8F1DslXjq4r7RMhEL8VeZ5xNB82dN3Bf6APHz7RqL8h cHYi0nLmzreKL7YxSlefvd/HxQdfnbM/Yq+v/9QZWCpr9iZVJsm99cHxA1ejYaM= =yWt0 -----END PGP SIGNATURE-----