The NX Node configuration file, namely the /usr/NX/etc/node.cfg file, allows to specify path to NX executables and libraries to be used instead of the default ones provided with the installation.

If the following keys are added to the /usr/NX/etc/node.cfg file, every user starting a new session on the server will use binaries and libraries as specified by these keys. For example set the following values to make all NX users use binaries and libraries contained respectively into the nxdebug.bin and nxdebug.lib directories:

PathBin = "/usr/NX/nxdebug.bin"
PathLib = "/usr/NX/nxdebug.lib"

A typical sample use of NX alternative binaries and libraries is for setting up a debugging environment or a test environment. 

it is also possible to specify alternative binaries and libraries on a per-user basis by creating a proper node.cfg file suitable for the specific user, e.g. :

/usr/NX/etc/nxdebug.node.cfg

When user nxdebug runs a new session, all settings in his/her personal configuration file will become effective. If the PathBin and PathLib keys are specified, he/she will use those binaries and libraries.  Settings specified in a personal configuration file are not affecting the other users.