Update README.md

README.md

@@ -7,6 +7,10 @@
 * Blocking point-to-point communication
     * Sending and receiving with MPI_Send and MPI_Recv
 
+*Some Useful links:*
+* [What is a Makefile and how does it work?](https://opensource.com/article/18/8/what-how-makefile)
+* [MPI Tutorial](https://mpitutorial.com/)
+
 ## Prepare your User
 To establish ssh connection between master and slaves without prompt required password we copy
 public id on slave machines as following
@@ -45,6 +49,3 @@ mpirun -np 3 -f mpi_hosts ./mpi_sampl
 
 Use Makefile
 To compile the program type "make" which compiles the program with "mpicc".
-
-*Useful Links*
-* [MPI Tutorial](https://mpitutorial.com/tutorials/)
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