Vanilla installs of the BigFix client will include QnA for development and debugging purposes.  But one problem…

if you try to launch it you receive the following error:

qna: error while loading shared libraries: libBEScrypto_1_0_0_1.so: cannot open shared object file: No such file or directory

The way to fix that is to execute the following command…

export LD_LIBRARY_PATH=/opt/BESClient/bin

This will let you launch QnA on several flavors of Linux…
(Tested on CentOS and openSUSE)

Reference (thanks Noah):  http://forum.bigfix.com/viewtopic.php?id=2685