Validate start-dfs.sh

I am trying to setup a Hadoop cluster, where master is my laptop and slave is the virtualbox, following this guide . So, I did, from *master*: gsamaras@gsamaras:/home/hadoopuser/hadoop/sbin$ sudo ./start-dfs.sh Starting namenodes on [master] root@master's password: master: namenode running as process 2911. Stop it first. root@master's password: root@slave-1's password: master: datanode running as process 3057. Stop it first. slave-1: starting datanode, logging to /home/hadoopuser/hadoop/logs/hadoop-root-datanode-gsamaras-VirtualBox.out Starting secondary namenodes [0.0.0.0] root@0.0.0.0's password: 0.0.0.0: secondarynamenode running as process 3234. Stop it first. gsamaras@gsamaras:/home/hadoopuser/hadoop/sbin$ su - hadoopuser Password: -su: /home/hduser/hadoop/sbin: No such file or directory hadoopuser@gsamaras:~$ jps 15845 Jps And the guide states: "The output of this command should list NameNode, SecondaryNameNode, DataNode on master node, and DataNode on all slave nodes.", which doesn't seem to be the case here (*does it?*) and then I checked the *slave*'s log: cat hadoop-root-datanode-gsamaras-VirtualBox.log ..rver: master/192.168.1.2:54310. Already tried 9 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1000 MILLISECONDS) 2016-01-24 02:42:14,160 WARN org.apache.hadoop.hdfs.server.datanode.DataNode: Problem connecting to server: master/192.168.1.2:54310 gsamaras@gsamaras-VirtualBox:/home/hadoopuser/hadoop/logs$ ssh master gsamaras@master's password: Welcome to Ubuntu 14.04.3.. The logs in the master node seem error-less. Notice that I can do a password-less ssh from master to slave, but not vice versa, the guide doesn't mention something like this. Any ideas *please*? --- When I execute stop-dfs.sh, I am getting the erroneous message: slave-1: no datanode to stop --- Now, I did it again and I got in the *master*: gsamaras@gsamaras:/home/hadoopuser/hadoop/sbin$ sudo ./stop-dfs.sh Stopping namenodes on [master] root@master's password: master: no namenode to stop root@master's password: root@slave-1's password: master: no datanode to stop slave-1: stopping datanode Stopping secondary namenodes [0.0.0.0] root@0.0.0.0's password: 0.0.0.0: stopping secondarynamenode gsamaras@gsamaras:/home/hadoopuser/hadoop/sbin$ jps 19048 Jps gsamaras@gsamaras:/home/hadoopuser/hadoop/sbin$ ps axww | grep hadoop 19277 pts/1 S+ 0:00 grep --color=auto hadoop gsamaras@gsamaras:/home/hadoopuser/hadoop/sbin$ jps 19278 Jps and ps axww | grep hadoop in the *slave*, gave process with id 2553.