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-vanilla-13.0-wheezy-amd64.iso.sig gpg: Signature made Tue Oct 15 17:11:19 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 839345c12c62ec62dc1c698e4e531c5062620c27 * md5sum 02bc0955a341ce54338f009c883e201f 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) iQEcBAABAgAGBQJSXXctAAoJEIXCXpWhbrlNCJ0IAJowrx6jxDjljXEoaNO0+RJu GAGuySEsph5RHVNwr449WHWTmD2BleaLYtnpUm4ZMO+RvTMhTQJIXhqHsSRx4nyi Y7TAPLAaqjx9fdwVE4xqy4igQBuPbNCv8KKUAEyME6pjZMUZ9rGFJj0UwSlvEnpr Lip3TmC8JUdupzwWkiJZxiiejoHq3BucazHMD2dYU2Vp8wupsx2RPg4uPFOL00/3 qvxA/yHe9ru1ApV0oZcHdC99pkM1CgQ7QM0spHrcQ7TfxNYlhTwOt1sm0oAqmN7U fcwYe+USTxI6iPV0scR+Px0d66F+UrGnGhjivoLjEQK5wgZyK1SSLEaV/EpZ1Xw= =DX1x -----END PGP SIGNATURE-----