Update READEME.md

README.md

@@ -24,20 +24,20 @@ the way given below, to generate an executable *mpi_sample*.
 mpicc -o mpi_sample mpi_sample.c
 ```
 
-**Note**: compile your code within the **/nfs** shared directory
+**Note**: compile your code under the **/nfs** shared directory
 
 To run it only in your machine (with 2 processes), you do
 ```
 mpirun -np 2 ./mpi_sample 
 ```
 
-Now, to run it within a cluster (add the hostname of the cluster's node you want to use),
+Now, to run it in the cluster (add the hostname of the cluster's node you want to use),
 
 ```
-mpirun -np 5 -hosts master,localhost ./mpi_sample
+mpirun -np 5 -hosts master,slave1 ./mpi_sample
 ```
 
-Or specify the same in a hostfile 
+Or specify the same in a hostfile (add user=mpiuser for slave1, slave2 hosts)
 
 ```
 mpirun -np 3 -f mpi_hosts ./mpi_sampl