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-dokuwiki-12.1-squeeze-amd64.iso.sig gpg: Signature made Wed May 1 12:23:20 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum af935bac3e61510f588cb4c1da788d60d99af8db * md5sum 09108865d364b947eb8174a41100627d 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 v1.4.10 (GNU/Linux) iQEcBAABAgAGBQJRgQkwAAoJEIXCXpWhbrlNbKMH/3aqV4z+ma4f0u39QwJpDbuD uW1FJaIBVMazScM4sNp25m9D98nIsoHYr+By9dHSJN2iJwEylQkoOOw4cgDLF3Wa RK9wIwTr+ENG+3Q7dhfUUud/OL8tuNvn9+/zh7ET1I4m8d07vJUJh8YW2iG566mg CcnYRpfAmYutisBrK2Fv+YbMJFK6hOWMDQWaemdPrtph8C2MCiTURTc0f8EN3YWu EoF6Y/eChPIHsBnSjttJgdRFP5c2VA0xHBbZxmLy0gxbsXNMQaaIOoacJnKi3GbG /LxGE3Rl4oaBFf8MYKS8pSFkZo/o8UnJtwRzWVpjM65axR5fpxdIW0hHHUydkBM= =YXib -----END PGP SIGNATURE-----