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-cakephp-12.0-squeeze-x86-xen.tar.bz2.sig gpg: Signature made Tue Aug 21 15:12:50 UTC 2012 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key For your convenience we also include file checksums: * sha1sum 269dbe1925deda1a7c07b5bc5aa673ebeb409b69 * md5sum 34990f8fd19571fd5cb8598ec0bf5457 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) iQEcBAABAgAGBQJQM6VqAAoJEIXCXpWhbrlNMPMIANsgWpb/p6X2H/ywq1qx+aDi uCFun5fhu1MaKAgYgRGzrHFE9JkYzMBJz5tWSAdKWFmjw26UwVQ8MxqLIV87Wpkv LOKMQPWuyYwojTE0eNg3j9hl4cDDItoHUAS8uUwiNa49c1RaQNnYLRSn8rdbPPBJ TqKG/6N8LPrJBp0YZOt5TiPrPmyqcbwCTymUzaS/AmMMlke7eP2qfnE2HaeUeKJ5 P3bm6FdQuJr8cfIRBpnoMRA5O6KzUZlqpHoKT6X7/1UeUhx8a9lcU+T+EeFHbK0H 0tUlDPLolfFlQJMw0oq/+lyAfudmN02AR6K2BHA23dhbPBS0dujQVVX1anGK6hQ= =/dH8 -----END PGP SIGNATURE-----