/usr/share/dune-grid/grids/dgf/distorted-cube-3.dgf is in libdune-grid-dev 2.5.1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 | DGF
vertex
firstindex 0
0 0 0 # 0
1 0 0 # 1
0 1 0 # 2
1.1 1.1 0 # 3
0 0 1 # 4
1 0 1 # 5
0 1 1 # 6
1 1 1 # 7
#
cube
0 1 2 3 4 5 6 7
#
#
|