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-joomla15-13.0-wheezy-i386.iso.sig gpg: Signature made Mon Oct 14 17:44:24 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum e2efb8840d5f533269246fa0f5a12b109c51ad50 * md5sum b29e755b7a68455e42ec8e052476674b 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) iQEcBAABAgAGBQJSXC1tAAoJEIXCXpWhbrlN8AoIAKLeVaCp9Id8w5KxmPxdAi/v N0VJtdCBr47Soa5lCqM1FmMPwhcoidwphv2xl32u4UP+9z0ib8o14Pocz4vXHa8u YKMgh5KPDoev4TRIskknr6AM/+axFS5rTyAkTDKw7BRRgQKxbp+P9/HoUDeaEz9d 23M8S3ExamoreW81X0vJVqbddqU8beP4QZadtWo3DgNP3igZCJEHJSfrIUr5m9Eb nZlPZ0W/JDRlfPrkFd8VylrIJCCDWNmVWNCFL2u55bkJybVVI7htiKAswX1c0pEj 3qNMDf6REG/wMFyECxjohNpoGfN2CoIm6SzuDE/WVfa9hCWJ6vDHYdUON41GTYA= =jf6X -----END PGP SIGNATURE-----