NIS_PATH Environment VariableYou can change or augment the list of directories NIS+ searches through by
changing the value of the environment variable NIS_PATH. NIS_PATH
accepts a list of directory names separated by colons:
setenv NIS_PATH directory1: directory2: directory3 ... |
or
NIS_PATH=directory1: directory2: directory3 ...;export NIS_PATH |
NIS+ searches through these directories from left to right. For example:

Like $PATH and $MANPATH, the NIS_PATH variable accepts the special symbol, $.
You can append the $ symbol to a directory name or add
it by itself. If you append it to a directory name, NIS+ appends the default
directory to that name. For example:

If you use the $ sign by itself (for example, org_dir.$:$), NIS+ performs the standard name expansion described
earlier: it starts looking in the default directory and proceeds through the
parent directories. In other words, the default value of NIS_PATH is $.
Keep in mind that additions and changes to your NIS_PATH may increase the number of lookups that NIS+ has to
perform and thus slow down performance.