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-xoops-13.0-wheezy-i386.iso.sig gpg: Signature made Mon Oct 14 19:39:01 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum f5ff5c0edef5aa7062ff07daabb1d84070786942 * md5sum f2037bd3a57a3bb7a941f7b0e3e57d97 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) iQEcBAABAgAGBQJSXEhKAAoJEIXCXpWhbrlN59sH/R7vP+sOxdodyMQTYJDhs4Wr F9KCRBI0x6su5/Gtle5s9cI58G6weFCDg+Qgp8pcvBFuX/BstgExh6Wcl6Upmwmg 1eIPEXq3tBzH0m7KpOdrF3wHpKWR0wN2cuxMUfqUuTn67vMVCmxf1Wy9Ghl99rSX Tw2lzjLEbNDzfm7DmRydAKw5jPC9NcLuozN8UPZZ/SdrJbBP2PSZdUoSfv6WuQmU 6hvH1NnVi1Ed12p2u0JIhxL1X/RlaEXfqdxZKk0zINyH5Z5DZMCIMZyNN+M7DV5v Ps+NqaasBt47eC/4tjDGQfv6UmAbm+52GXM3vsITdFzQZyJKuPZV9m9iVzu01d4= =CC3g -----END PGP SIGNATURE-----