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-roundup-13.0rc2-wheezy-amd64.iso.sig gpg: Signature made Wed Aug 7 08:50:43 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum dee603b25b9ef3c140b9d3c6e62cc423901e002e * md5sum b081bcfc135326804edb1650e38ede1c 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) iQEcBAABAgAGBQJSAgpbAAoJEIXCXpWhbrlNKfMIAODpHvMtavv5unBdvyBLEglt qHUWpdcIkoFeoIW02sPQv07kU67ExfMZccEXko1vBD9XWnpMsPOIlAPO+sHjsTyp D8e0tibgEMHPle52fk0ZxiOZ1MkwaNIKpvO6lntaaag3qQlxMFItPN43AAT8bczy eS8XY3G1gY7/grDtBsi2ho8BK6t/iLEn+iuunzAN8T64YWz01R5ZA5aIrVmmKrWZ lz8lkJyO8T/LuUIP1VbiJVgKNa3YiyPEsvAfAwNN7hRYZS9PJYq5q5i2f1LP8GV4 IGKx+0O+RBdZAxCOPbOhoqgapVzFIEyf77k99Itbg7tU2atd3FvK+ZcUayWi+Gs= =+gAI -----END PGP SIGNATURE-----