Connect to clusters using SSH - E-MapReduce
cluster master machine. It will match with the port used in SSH command executed in the terminal.
120.* is used to cluster master exists. You can log on to the master node through SSH to view various settings and states.
The function of ...
SSH key pairs - Elastic Compute Service
What is an SSH key pair?
An SSH key pair, or key pair for short, is a secure authentication method. You use the private key to connect to your instance by entering SSH commands or using other tools, and you no longer need to ...