afni.nimh.nih.gov

Thanks a lot Rick! that was very helpful. No, we don't have a System Administrator. As you guessed it, we are just beginning to use Red Hat Linux. We have three individual users. To change the shell, I opened /etc/passwd and found /bin/bash at 5 locations:
the 3 individual profiles, the root and rpm. So, do I simply have to change /bin/bash to /bin/tcsh at all the 5 places, logout and login again?

-Anand.