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-symfony-13.0-wheezy-amd64-vmdk.zip.sig gpg: Signature made Wed Oct 16 10:15:44 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 08c052a00396177ed9e5467850a54e59a311ae26 * md5sum e90bd2f5280580c46d50b245d42a5926 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) iQEcBAABAgAGBQJSXmdGAAoJEIXCXpWhbrlNqd4H/iOpVzO8QT31JzaXyp/jY2q/ VNCN3d7LsA65TMYi6/Aop/5spZmypqZAj3kv7Z5rMc2/RuyAXRXaUm2dkzkW1OOo p3vJytBlVKwAuE9SGVRr7tnVoVElIFp+hAfLMBkFC/qUL6GVy4fM+g/VmpO1yYpX sitA6gEFj/o7gItakx9eM/geJnR+KY0RfOY2wJVHEq2oSyS7HeVkMy/qHih0tprr SQGOYlcRV8rcPdqedngYF6Bhy0yI3Is5XXOczjAtDQPdYcifqO8x/oRVPXSf5Ofs foH/mNl6/mDhSp0992ht/ZCmQ09A8BZ+8CfQPaXr3FLqFziap+zgU3yKsIxThvk= =fmRA -----END PGP SIGNATURE-----