https://ftp.ast.cam.ac.uk/pub/sverre/
make clean make mcluster ./mcluster -o name-of-file
make clean make
../Nbody6-last-test2/Ncode/nbody6 <name-of-file.input > Ttest.log 2>Ttest.err&
https://github.com/smhr/read-nbody
make READ-NBODY-TAIL make READ-NBODY-RT make READ-NBODY-2RT
./READ-NBODY-RT OUT3 my_simulation 0 0
./READ-NBODY-2RT OUT3 my_simulation 0 0
./READ-NBODY-TAIL OUT3 my_simulation 0 0