hadoop 单机节点安装
Execution

Format a new distributed-filesystem:
$ bin/hadoop namenode -format

Start the hadoop daemons:
$ bin/start-all.sh

The hadoop daemon log output is written to the?${HADOOP_LOG_DIR}?directory (defaults to?${HADOOP_HOME}/logs).

Browse the web interface for the NameNode and the JobTracker; by default they are available at:

• NameNode?-?http://localhost:50070/
• JobTracker?-?http://localhost:50030/

  Copy the input files into the distributed filesystem:
  $ bin/hadoop fs -put conf input

  Run some of the examples provided:
  $ bin/hadoop jar hadoop-examples-*.jar grep input output 'dfs[a-z.]+'

  Examine the output files:

  Copy the output files from the distributed filesystem to the local filesytem and examine them:
  $ bin/hadoop fs -get output output?
  $ cat output/*

  or

  View the output files on the distributed filesystem:
  $ bin/hadoop fs -cat output/*

  When you're done, stop the daemons with:
  $ bin/stop-all.sh