#!/bin/bash

# compile
mpicc -o /ubuntu/mpi_hello_world i./mpi_hello_world.c

# scp hello wrold to all clients. sudo -u mpi for auto scp connect. see /home/mpi/.ssh 
while read -r line; 
 do 
    scp /ubuntu/mpi_hello_world ubuntu@$line:/ubuntu/mpi_hello_world
done < /ubuntu/hosts

# cd to work dir
cd /ubuntu

# run it! 
 mpirun -n 10 -f /ubuntu/hosts  /ubuntu/mpi_hello_world  2>&1 | tee /tmp/output.log