title: Error while running MPI cluster program in LAN
body: <p>Getting error while running MPI cluster program in a LAN environment. I have created a master and other clients in a local LAN environment. I follow this tutorial to create a cluster and runs it, <a href="http://mpitutorial.com/tutorials/running-an-mpi-cluster-within-a-lan/" rel="nofollow noreferrer">Running an MPI Cluster with in LAN</a></p>
  
  <p><strong>mpiuser@507-12</strong>:~/cloud/mpich-3.0.4/examples$ <strong>mpirun -np 4 -hosts 192.168.100.77, 192.168.100.78 ./icpi</strong> </p>
  
  <pre><code>mpirun: Error: unknown option "-o" Type 'mpirun --help' for usage.
  </code></pre>
  
  <p>It's saying that we should use proper tags while writing the command and then it will work. But, I tried many ways to run it by changing or altering the tags. Still getting the same error. Couldn't figure out whats going wrong. Kindly, help me in due respect. Thanks.</p>