we need to create new ssh key with the followingstarcluster createkey mykey - ssh/mykey rsa now that we have configured node cluster and set up the keyslet' try it out starcluster start mycluster this may take few minutes as it allocates new machines why when our cluster is only nodeswe always have master node all of these nodes have the same filesystemso anything we create on the master will also be seen by the slaves this also means that we can use jug on these clusters these clusters can be used as you wishbut they come pre-equipped with job queue enginewhich makes them ideal for batch processing the process of using them is simple you log in to the master node you prepare your scripts on the master (or better yethave them prepared before hand you submit jobs to the queue job can be any unix command the scheduler will find free nodes and run your job you wait for the jobs to finish you read the results on the master node you can also now kill all the slave nodes to save money in any casedo not forget that your system is running over the long term otherwisethis will cost you (in the dollars and cents meaning of the wordwe can log in to the master node with single commandstarcluster sshmaster mycluster we could also have looked up the address of the machine that was generated and used an ssh command as we did earlierbut when using the preceding commandit does not matter what the address wasas starcluster takes care of it behind the scenes for us as we said earlierstarcluster provides batch queuing system for its clustersyou write script to perform your actionsput it on the queueand it will run in any available node at this pointyou will need to repeat the actions to install the needed packages on the cluster if this was real projectwe would set up script to perform all the initialization for usbut since it is tutorialyou should just run the installation steps again