index

start-dfs.sh

start-yarn.sh

Or below command start both above:

To check Hadoop instance, run:

jps

4992 SecondaryNameNode

4517 NameNode

5179 ResourceManager

4700 DataNode

5532 NodeManager

59982 jps

This Hadoop instance has 5 java processes:

yarn processes:

NodeManager

ResourceManager

NameNode, SecondaryNameNode are name node, which is master node

DataNode