Update your Environment

NEURON makes heavy use of its installation location to find scripts, libraries, and other things it needs and it tries to find them using the environment variables NEURONHOME and CPU. Set the NEURONHOME environment variable to the directory you extracted the NEURON tar files into. For illustrative purposes I assume you did this in /usr/local/neuron and that that is your current working directory. Set the CPU environment variable to the name that results when you execute
make CPU
For illustrative purposes call it SUN4. If your shell is the a c-shell add the following to your .cshrc file.
setenv NEURONHOME /usr/local/neuron
setenv CPU SUN4
set path=($path $NEURONHOME/bin $NEURONHOME/bin/$CPU interviews_path/bin/${CPU})
setenv LD_LIBRARY_PATH=$NEURONHOME/bin/${CPU}:interviews_path/lib/${CPU}
These changes will take effect immediately if you execute:
source $home/.cshrc
For other shells the info to add is the same -- only the syntax differs.