diff --git a/README.md b/README.md
index a306252..f52585c 100644
--- a/README.md
+++ b/README.md
@@ -37,11 +37,11 @@ This is a quickstart guide of how you can typically use this *LabInstance to dep
 
 - run the MPI hello world program
 
-sudo -u mpi mpirun -n 10 -f /project/hosts  /project/mpi_hello_world
+> sudo -u mpi mpirun -n 10 -f /project/hosts  /project/mpi_hello_world
 
 
 ---
-**NOTE**
+**NOTE:** copy hello world to all clients
 
 ```bash
 # scp hello wrold to all clients. sudo -u mpi for auto scp connect. see /home/mpi/.ssh