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-bambooinvoice-13.0-wheezy-amd64-ovf.zip.sig gpg: Signature made Wed Oct 16 08:16:28 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 26392b70e7457aed6dc9ee60b15e5a7ae1442d64 * md5sum c09485173d6e9682b4f3a9d724c9164a 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) iQEcBAABAgAGBQJSXktRAAoJEIXCXpWhbrlNKTQIAI3WLBUljETWmqks0mMLKWmc ULGEVeiTVujT6zdscoizoknnsSKwbH4COd8BlCT5U5yVztUM0sCgizoK/WXUNYW7 rP8e1JAejkhqgdIqAjpXmcj0tYbyxY/GD761X9jujsJCbP3eChj2M+6CS+9tcIXV MBIL6TA2z2bmE4Ye5zyf01GBcVY9yc0PCh3pKvoMWtuY46I2DeUEvtTXh+UHchj+ rRoOHWBYmkjmEgniX5FDMFMj75kRAeNN7sA89+JVbdL4Q0iUkPnw1PMLRvxCkWGI z600Lyfi3zXryYV+Ssn+pqrBie2gQfsP9rAg0YyzeqZXWNywN3M/UzELkL8wOfY= =E0gT -----END PGP SIGNATURE-----