hadoop: restart the cluster and run a job

Following the steps in the previous hadoop post, I have a working single instance hadoop cluster on my laptop. Here's a refresher on restarting it and using it.

Start up Hadoop

#login as hadoop user:
sudo -i -u hadoop

#start cluster:
/usr/lib/hadoop/bin/start-all.sh

#check cluster is running via jps:
jps
30957 SecondaryNameNode
31046 JobTracker
30792 DataNode
30638 NameNode
31533 Jps
31205 TaskTracker