art@mirella:~/Fortran/Intel$ more hosts.txt
nas3:8
mirella3:8
art@mirella:~/Fortran/Intel$ mpirun -machinefile hosts.txt -n 8 hostname
nas
nas
nas
nas
nas
nas
nas
nas
art@mirella:~/Fortran/Intel$ mpirun -machinefile hosts.txt  hostname
mirella
mirella
mirella
mirella
mirella
mirella
mirella
mirella
nas
nas
nas
nas
nas
nas
nas
nas
art@mirella:~/Fortran/Intel$ /mnt/intel/compilers_and_libraries_2020.2.254/linux/mpi/intel64/bin/legacy/mpiexec.hydra -f hosts.txt hostname
mirella
mirella
mirella
mirella
mirella
mirella
mirella
mirella
nas
nas
nas
nas
nas
nas
nas
nas