Configuration

7. Configuration for Pseudo-Distributed mode

   nano /usr/local/hadoop/conf/core-site.xml

   And this is Content Should Looks Like:

    
    
    hadoop.tmp.dir
    /usr/local/hadoop/tmp
    
    
    fs.default.name
    hdfs://localhost:8020
    
    
   

   Next:

   nano /usr/local/hadoop/conf/hdfs-site.xml

   So the Content Should Looks Like:

    
    
    dfs.replication
    1
    
    
    
    dfs.name.dir
    /usr/local/hadoop/cache/hadoop/dfs/name
    
    
   

   Last:

   nano /usr/local/hadoop/conf/mapred-site.xml

   The Content Should Look Like:

    
    
    mapred.job.tracker
    localhost:8021
    
    
   

8. SetUp Local Path & Environment

   exit

   nano $HOME/.bashrc

   Append:

   HADOOP_HOME=/usr/local/hadoop
   export PATH=$PATH:$HADOOP_HOME/bin:$HADOOP_HOME/sbin
   

   The JAVA_HOME is Set Following Oracle Java JDK7+ Installation Version…
   Then Load New Setup:

   bash

9. So to SetUp Needed Local SSH Connection
   Enable SSH Connection:

   System Preferences >> Sharing

   
   To Enable SSH Login without Pass:

   ssh-keygen -t rsa

   Press enter for each line…

   cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys

   chmod og-wx ~/.ssh/authorized_keys

   Testing Connection:

   ssh 127.0.0.1

   exit

10. Then for Formatting HDFS

    cd /usr/local/hadoop

    sudo su

    bin/hadoop namenode -format