How To Set Up Your Linux Account to Use Mpi
===========================================

Carefully follow the steps below. A ">" indicates your prompt so don't
type it. 

0)

Generate a public/private key pair for logging into other machines in the 
cluster without using a password.

>ssh-keygen

Accept the default key file of ~/.ssh/id_rsa by pressing return.
Use an empty passphrase, so press enter in response to the next question.
Enter the empty passphrase a second time.

1)

Copy your public key into ~/.ssh/authorized_keys.

>cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys


2) 

Logon to another machine and verify that a password isn't necessary.

>ssh boole

You will be asked if you want to continue connecting. Enter "yes".

If you are prompted for a password then you incorrectly entered one of 
the previous commands. Either try again from step 3 or contact me.

Logout from the remote machine.

>exit

3)

Run the "GenHostFile.sh"

4)

Copy and edit the mca-params.conf file to ~/.openmpi/mca-params.conf to
mention YOUR home directory rather than mine

5)

Compile and launch programs as follows. Modify your Makefile so that
CXX = mpic++.

>mpic++ -Wall Hello.cc -o Hello

>mpirun -n <number of processes> ./Hello