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-sugarcrm-13.0-wheezy-amd64-ovf.zip.sig gpg: Signature made Wed Oct 16 10:09:29 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum f12221e7599ac1ffd1ada0a8f0b8c860bf4cdb14 * md5sum cf8c538849cb2185b9f093004de91675 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 v1.4.12 (GNU/Linux) iQEcBAABAgAGBQJSXmXOAAoJEIXCXpWhbrlNljQIALWcI5UUtKdSDDnuo5Jypt1E 1pGdGMV8Dx6T4IpiF1w9G7yWoAqnFAY3EqBQyBeazizFmEMBKfB0keb1Dzb1BCEo VfN1IQpYwwMq4Efl/i9zVtSCYiMOMjlaNNBVHjq4KNwtpekmrk4gLUj/73FcPEGn WFdFMDE18JzmVfTBBOxUJrXNS2oUBfTnL/JIE7MihJkM63XUs3rVqdDpPIYV9MaI UeQSn0wWoY3tb1gHqWB35F+A6GPlB1FgQKxJhPUAhIad3D2hTE7+B0tuGax1RGT2 U92qdVSdh5eMXWjLsXMu7TvPOQha9zUloDa+eD1w1nv/w3BEqQLUFXFfDuc0CAc= =Fomf -----END PGP SIGNATURE-----