Fetching the gnuzipped tar file:

Save, gunzip and untar in a directory:

tar tvf nbody0.tar

tar xvf nbody0.tar

equivalently:

gunzip -d -c nbody.tar.gz | tar xvf -

Compile the Fortran code:

g77 -o xrun main.f nbody0.f nbodyio.f

Generate initial star distribution with 3000 points

Run the test program first

xnb0 < data.in &

Visualize and animate with DX