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-typo3-12.0-squeeze-x86-xen.tar.bz2.sig gpg: Signature made Tue Aug 21 17:20:07 UTC 2012 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key For your convenience we also include file checksums: * sha1sum 30e7e9a64a9cbd21e142ab349d7ff9a2e4b67250 * md5sum 44842fafa590b09807d2cb1f3f716e5d 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) iQEcBAABAgAGBQJQM8M7AAoJEIXCXpWhbrlNYv0IAK0gioSuu1Zh6iswadF9DJmY 14VtOKeHa7K7CxDanZ+qzrvtVqJhjOH9KJcYAIFk5SYe923jvaj+QnqqfgBDoA2V CRF+CzsbcroWB+7lL7Ca5zrmfZ6VzcrmEv4MvCLI+xAd3nZvh/kyhIfdGM1hI4ZM rvlHfr85nV3CxGcOkxcHAtEJRYutjYv5HCTzrsJTtdI6NCeMB9flLYElTK2Qad58 +4AzrX/noxPLMe3yyCDRYvb9fdmqVZHB+inHc0r73ldWyAaFmF+UTq0F7egiF0pl cL64HMiACHGYWqMxCMwRCaRlIg4lsAuppDvBGgRHrFUz5EdGMTFzF1M14k6dnsU= =r4Li -----END PGP SIGNATURE-----