/usr/lib/grass64/etc/nviz2.2/scripts/ is in grass-gui 6.4.3-3.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/grass64/etc/nviz2.2/scripts/ACS_utils.tcl
/usr/lib/grass64/etc/nviz2.2/scripts/assoc.tcl
/usr/lib/grass64/etc/nviz2.2/scripts/attIsosurfPopup.tcl
/usr/lib/grass64/etc/nviz2.2/scripts/attPopup.tcl
/usr/lib/grass64/etc/nviz2.2/scripts/colorPopup.tcl
/usr/lib/grass64/etc/nviz2.2/scripts/config.tcl
/usr/lib/grass64/etc/nviz2.2/scripts/configIndex
/usr/lib/grass64/etc/nviz2.2/scripts/cutplane_channels.tcl
/usr/lib/grass64/etc/nviz2.2/scripts/extra_bindings.tcl
/usr/lib/grass64/etc/nviz2.2/scripts/fileBrowser.tcl
/usr/lib/grass64/etc/nviz2.2/scripts/filemapBrowser.tcl
/usr/lib/grass64/etc/nviz2.2/scripts/flythrough.tcl
/usr/lib/grass64/etc/nviz2.2/scripts/mapBrowser.tcl
/usr/lib/grass64/etc/nviz2.2/scripts/multimapBrowser.tcl
/usr/lib/grass64/etc/nviz2.2/scripts/nviz2.2_script
/usr/lib/grass64/etc/nviz2.2/scripts/nviz_init.tcl
/usr/lib/grass64/etc/nviz2.2/scripts/nviz_params
/usr/lib/grass64/etc/nviz2.2/scripts/panelIndex
/usr/lib/grass64/etc/nviz2.2/scripts/panel_animation.tcl
/usr/lib/grass64/etc/nviz2.2/scripts/panel_arrow.tcl
/usr/lib/grass64/etc/nviz2.2/scripts/panel_color.tcl
/usr/lib/grass64/etc/nviz2.2/scripts/panel_cutplane.tcl
/usr/lib/grass64/etc/nviz2.2/scripts/panel_fringe.tcl
/usr/lib/grass64/etc/nviz2.2/scripts/panel_kanimator.tcl
/usr/lib/grass64/etc/nviz2.2/scripts/panel_label.tcl
/usr/lib/grass64/etc/nviz2.2/scripts/panel_legend.tcl
/usr/lib/grass64/etc/nviz2.2/scripts/panel_lights.tcl
/usr/lib/grass64/etc/nviz2.2/scripts/panel_main.tcl
/usr/lib/grass64/etc/nviz2.2/scripts/panel_pos.tcl
/usr/lib/grass64/etc/nviz2.2/scripts/panel_resize.tcl
/usr/lib/grass64/etc/nviz2.2/scripts/panel_rquery.tcl
/usr/lib/grass64/etc/nviz2.2/scripts/panel_scale.tcl
/usr/lib/grass64/etc/nviz2.2/scripts/panel_sdiff.tcl
/usr/lib/grass64/etc/nviz2.2/scripts/panel_site.tcl
/usr/lib/grass64/etc/nviz2.2/scripts/panel_surf.tcl
/usr/lib/grass64/etc/nviz2.2/scripts/panel_tst.tcl
/usr/lib/grass64/etc/nviz2.2/scripts/panel_vect.tcl
/usr/lib/grass64/etc/nviz2.2/scripts/panel_vol.tcl
/usr/lib/grass64/etc/nviz2.2/scripts/panel_vquery.tcl
/usr/lib/grass64/etc/nviz2.2/scripts/position_procs.tcl
/usr/lib/grass64/etc/nviz2.2/scripts/queue.tcl
/usr/lib/grass64/etc/nviz2.2/scripts/script_file_tools
/usr/lib/grass64/etc/nviz2.2/scripts/script_get_line
/usr/lib/grass64/etc/nviz2.2/scripts/script_play
/usr/lib/grass64/etc/nviz2.2/scripts/script_support.tcl
/usr/lib/grass64/etc/nviz2.2/scripts/script_tools
/usr/lib/grass64/etc/nviz2.2/scripts/send_support.tcl
/usr/lib/grass64/etc/nviz2.2/scripts/site_attr.tcl
/usr/lib/grass64/etc/nviz2.2/scripts/structlib.tcl
/usr/lib/grass64/etc/nviz2.2/scripts/tclIndex
/usr/lib/grass64/etc/nviz2.2/scripts/unique.tcl
/usr/lib/grass64/etc/nviz2.2/scripts/widgets.tcl
/usr/lib/grass64/etc/nviz2.2/scripts/wirecolorPopup.tcl