Final answer:
The command to remove a Peer node from the Master varies based on the system; for Hadoop, it's 'hdfs dfsadmin -refreshNodes' after updating exclude lists, and for Kubernetes, it's 'kubectl delete node [node_name]'.
Step-by-step explanation:
The command used to permanently remove a Peer node from a Master node in a cluster environment depends on the specific technology or system being used. For instance, in Hadoop, you would use the HDFS shell command 'hdfs dfsadmin -refreshNodes' after updating the exclude list. However, in other distributed systems like Kubernetes, the command would be 'kubectl delete node [node_name]' to remove a node from the cluster. It is important to follow the specific procedures of the cluster management system you're using, which generally involves steps to ensure data replication and integrity before removing the node.