As this parameter consumes space in the tagged string area of NVRAM, you should keep the filename as short as possible. The tagged string area is described in Chapter 11, Boot Monitor and NVRAM.
Table 6-6 config-unix-directory Parameter
Possible Values
Results
default
The terminal searches the /usr/lib/X11/ncd/configs directory for configuration files.
pathname
The terminal searches the specified directory for configuration files.
The directory must be world-readable and can be world-writable.