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-tendenci-13.0-wheezy-amd64.iso.sig gpg: Signature made Tue Oct 15 17:04:45 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 19f9ac686527d2c62cdd914728b981b4ee26d250 * md5sum 682e51b09e7475c8129705a5f406b8c0 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) iQEcBAABAgAGBQJSXXWjAAoJEIXCXpWhbrlNDosIAMpTQoZ4KjpUBvwurgiMLT6t ao6eYisoVCBpglbyfkgK25Iluc1kghLumhDiGoIdBKOvLlFJNOEAfIMhEtsb07/P WoXDv5Guu6EoEySTEj9S4640izaR2OMTIr2kwn3fkA6OQpp0VMZ7bUobruh7MhpS pWDWs0ZvN3FqpzDmqFCTJn9Psj7QrMCpohGkEeqPmn+0s9+2piZHrSc8ZZtdLzb6 x0/1CUd3s6aX96DLxsy8Vzmhgzrq8LfogjMSngkINHLvG7hCugGUiGVh6uOnr4Cs Aflzl0l1c1txMCvzrHrjEBdxXZISwgnLl0Tc+IXRCDjiJ49IkvPrD30BFwOP3NY= =rngF -----END PGP SIGNATURE-----