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-tomcat-apache-12.0-squeeze-x86-vmdk.zip.sig gpg: Signature made Tue Aug 21 12:33:11 UTC 2012 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key For your convenience we also include file checksums: * sha1sum 08ad33da8851c0a657db2e4fe4a07e1fef24b325 * md5sum ff4b50f008215f86a474e1da7c9cd32a 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) iQEcBAABAgAGBQJQM3/5AAoJEIXCXpWhbrlNvMIH/3Al0aAxGLWNr5ym2EkTtl4a Gy0XGvCmyNCTT4XeQfLrIsfgMzKAaeKPcQ54VKSNUF8PE+YXo3R+aRMB2pwJQ+of H5yLxQKPcvZ/OSIIXRE8BAQvBcTQJ0pUMPFKCVsXbAz3j9UneWoob28FahJ2ZV9e awTOgLg0b9dSdX7RjpVStXPRt2uH5XFyhTrMWLHNvfy0C6lwKkNznjoqTP/ERY64 KlWraCrJ3a7kZJ7sd0ykE/yDdFrGqLHwBkmnaIKuBnqKPhChkGNqF827X40PBnrC QCet5pyq3oq1NUMZFT5KdjR1o2PGz+pkfTPrLmhAUsOOPconBdG5cD8EqVo43n4= =5BZ2 -----END PGP SIGNATURE-----