The final step in the replica set's deployment is to open a mongo shell on only one of the servers in the replica set:
mongo --host <hostname>
You can then run the rs.initiate() command to perform the initialization. In the following example, we are initializing a replica set with three servers, ed, ted, and fred:
The rs.conf() and rs.status() commands can be used to confirm the status and health of the replica set. The full list of replica related commands can be found here: https://docs.mongodb.com/manual/reference/method/js-replication/#replication-methods.
