/usr/share/doc/libhdf4/examples/GR/ is in libhdf4-doc 4.2r10-0ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/doc/libhdf4/examples/GR/README_GR
/usr/share/doc/libhdf4/examples/GR/create_and_write_image.c
/usr/share/doc/libhdf4/examples/GR/create_and_write_image.f
/usr/share/doc/libhdf4/examples/GR/create_and_write_image.out_c
/usr/share/doc/libhdf4/examples/GR/create_and_write_image.out_f
/usr/share/doc/libhdf4/examples/GR/create_and_write_image.txt
/usr/share/doc/libhdf4/examples/GR/get_attribute.c.gz
/usr/share/doc/libhdf4/examples/GR/get_attribute.f
/usr/share/doc/libhdf4/examples/GR/get_attribute.out_c
/usr/share/doc/libhdf4/examples/GR/get_attribute.out_f
/usr/share/doc/libhdf4/examples/GR/get_attribute.txt
/usr/share/doc/libhdf4/examples/GR/image_info.c
/usr/share/doc/libhdf4/examples/GR/image_info.f
/usr/share/doc/libhdf4/examples/GR/image_info.out_c
/usr/share/doc/libhdf4/examples/GR/image_info.out_f
/usr/share/doc/libhdf4/examples/GR/image_info.txt
/usr/share/doc/libhdf4/examples/GR/makec
/usr/share/doc/libhdf4/examples/GR/makef
/usr/share/doc/libhdf4/examples/GR/modify_image.c.gz
/usr/share/doc/libhdf4/examples/GR/modify_image.f
/usr/share/doc/libhdf4/examples/GR/modify_image.out_c
/usr/share/doc/libhdf4/examples/GR/modify_image.out_f
/usr/share/doc/libhdf4/examples/GR/modify_image.txt
/usr/share/doc/libhdf4/examples/GR/read_image.c.gz
/usr/share/doc/libhdf4/examples/GR/read_image.f
/usr/share/doc/libhdf4/examples/GR/read_image.out_c
/usr/share/doc/libhdf4/examples/GR/read_image.out_f
/usr/share/doc/libhdf4/examples/GR/read_image.txt
/usr/share/doc/libhdf4/examples/GR/read_palette.c
/usr/share/doc/libhdf4/examples/GR/read_palette.f
/usr/share/doc/libhdf4/examples/GR/read_palette.out_c
/usr/share/doc/libhdf4/examples/GR/read_palette.out_f
/usr/share/doc/libhdf4/examples/GR/read_palette.txt
/usr/share/doc/libhdf4/examples/GR/set_attribute.c
/usr/share/doc/libhdf4/examples/GR/set_attribute.f
/usr/share/doc/libhdf4/examples/GR/set_attribute.out_c
/usr/share/doc/libhdf4/examples/GR/set_attribute.out_f
/usr/share/doc/libhdf4/examples/GR/set_attribute.txt
/usr/share/doc/libhdf4/examples/GR/write_palette.c
/usr/share/doc/libhdf4/examples/GR/write_palette.f
/usr/share/doc/libhdf4/examples/GR/write_palette.txt