The rpc.rstatd daemon is a service that runs in both Linux and Unix that provides the mechanism to return performance statistics via remote procedure calls. By default, the rpc.rstatd is not installed on most Linux distributions. The package add command is different on various flavors of Unix and Linus. On the most common ubuntu distribution, just run the following two command.
sudo apt-get update
sudo apt-get install rstatd
If you are using a different distribution, just google the package add command for your server.
Once the rpc.rstatd is running, you should enable rsh connection. Do this by editing the .rhosts file in your $HOME directory and add the Controller name: