[user@amo-n001 ~]$ module load GCC/9.3.0 OpenMPI/4.0.3
[user@amo-n001 ~]$ mpicc hello_mpi.c -o hello_mpi
[user@amo-n001 ~]$ srun --ntasks=6 --distribution=block hello_mpi
 Hello from task 0 of 6 on amo-n001
 Hello from task 1 of 6 on amo-n001
 Hello from task 2 of 6 on amo-n001
 Hello from task 3 of 6 on amo-n001
 Hello from task 4 of 6 on amo-n001
 Hello from task 5 of 6 on amo-n002