afni.nimh.nih.gov

You might just use a series of commands (assuming that
you store your afni binaries in your home abin directory):

cd ~/abin
wget [afni.nimh.nih.gov]
tar xfz linux_glibc22.tgz
mv linux_glibc22/* .
rmdir linux_glibc22
rm linux_glibc22.tgz

- rick