You need to make them executable, eg
> Hi
>
> I download some python scripts to ~/.gimp-2.8/plug-ins and they not
> appear
> in gimps, then I try to move them to ~/.gimp-2.8/scripts but they not
> appear in gimp.
>
> scm scripts worked from ~/.gimp-2.8/scripts
# chmod 755 *.py
--
Owen