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-bugzilla-13.0rc3-wheezy-amd64.iso.sig gpg: Signature made Fri Sep 13 07:36:45 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 9b2aa3aa8149293ed9ce648f20fc043c7e6c6e14 * md5sum 039b3b51898b3613c236c9db76dbb1a8 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) iQEcBAABAgAGBQJSMsCFAAoJEIXCXpWhbrlNNXwH/R5XwI5haBTxTnI/jwmgP46F Ee3N+lH7j0mqUzNk6ZA/gb1E0+KYo3nJTpziTCy7sEvp+b3/drv2c283oluEL6OU p/SI9Z60ktkNjF2OaZ/yTqxF/UK0Zg1ZbmmpxrAe8qpU1GVYd5l6/UFYFMaXMf/8 JckVCbrPl0QA1RPmDVWFzrM/gV/uQvcU5XrghW1BoEpfRX9XjkQthVCuC6FJbrL3 pVxvI4alnLq9egA62BdTiM/Eeta1OAhE3xrT1msDQFN9Vq7J3Qcz6ZNWTOJO7ZSJ gaNKXQ6PyAVVPSJON4oWB4RiranwbSSs5hAvG/uw0nwuBOFcL8uftjAaG8mrTOU= =qbZR -----END PGP SIGNATURE-----