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-vanilla-13.0-wheezy-amd64-ovf.zip.sig gpg: Signature made Wed Oct 16 10:39:59 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 1ef2cdb2c9cd4924f42227f6a2856e0905b48a4d * md5sum c3d0f8ce6176e1b9c9b330f1b1408606 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) iQEcBAABAgAGBQJSXmz1AAoJEIXCXpWhbrlNizMIAL5kMFY/KmmSibbgkpVwF7/D eaz0MSAPisMVgJk4NDAT1InYNIUtJWmJYb75e8rI1xSMZAGk/nl/SA4fiP4/w05k WRfQjnjhJjS6kZAPHMScP1HD5c+YgjuWGnZg0Tu1VeCNW9ygpx8sLu2MEwq1tGo7 JhFmjxxX4IBAEtkwfS9UljOHGWP+tfVI2Dp+zdLSszRPcqoWzQrQNVrNDe/uDLQZ OD8qQzKv2qmx/g8K+HltzhAQEA6m+0qyT2NYBGRx8xJW/poayrh668xJfI+wQS8w TpUeeDsZ/XuH4lo7Ab6/44ejKurHROeMeL2H+WQb515EK5x33eDgJxu/G0XvFzA= =gV8s -----END PGP SIGNATURE-----