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-magento-12.0-squeeze-x86-xen.tar.bz2.sig gpg: Signature made Tue Aug 21 15:49:09 UTC 2012 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key For your convenience we also include file checksums: * sha1sum f023de8dd3fd9750e7b2e2ad5ccf2b1f7ce0c234 * md5sum b15f450ed69a271dc936419d62d023ea 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) iQEcBAABAgAGBQJQM63rAAoJEIXCXpWhbrlN7poH/2VN3p3kPXGOWS1Gxmf+C2Qs xMM9eWfr6WsZPTK4RgH/xM6/Emg+kwltzQ1ImySkgaW71jb4351xIv/je2r4Xdfw aW/W2EnHaHqPlIv9IWwSUjGSCxY26WQC3P15Mq0dizxINxcJ4DxJPTyIrR4AZO7k bKaqE0wdRKu9j0Igc2Sz9v/YDNReohJf531wrnAOWa5WRUmFsLyoO+Ix4yux2mg1 Z0XkWJGLxw/pPW+egeRZ8QIYRLEmseGoJ9a99NftQxLFWLv+0I/Emt7vPSfhQCdi Q9ZByA6oR6Cl0HearboBF0HffjnjVmKXQbax/cIw8FNDGi6qaAqepwhSy/8vNb0= =qxbn -----END PGP SIGNATURE-----