afni.nimh.nih.gov

Well, you *do* have the AFNI binary directory in your $PATH, so that is good.

Re. the $DISPLAY variable, can you copy+paste the following into the Ubuntu terminal:

echo "export DISPLAY=:0.0" >> ~/.bashrc
echo "setenv DISPLAY :0.0" >> ~/.cshrc
echo "export NO_AT_BRIDGE=1" >> ~/.bashrc
echo "setenv NO_AT_BRIDGE 1" >> ~/.cshrc

and open a new terminal. In that new terminal, what does:

echo $DISPLAY

do?

--pt