thanks for the reply
it turns out, i needed to switch csh shell and setup the enviornmental variables. However, when tried to run the 'make optics' command once again, the following errors resulted:
f77 -static -fpe -cpp -C -I. -I/root/Desktop/optics -c optics.f
f77: unrecognized option `-cpp'
f771: unrecognized option `-fpe'
make: *** [optics.o] Error 1
this is a project i've been working on for months now, i'm very new to linux, so i've been inching by just to try to setup and get the program running. the program and its info can be found at