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single node configuration and HADOOP COMMANDS==================== ==========================

update the repositary

$sudo apt-get update

Step 6: Download Hadoop 1.2.0

$ wget http://archive.apache.org/dist/hadoop/core/hadoop-1.2.0/hadoop-1.2.0.tar.gz-----------------------6.1 Extract the downloaded package

$ tar -xvf hadoop-1.2.0.tar.gz========================================update path of hadoop

user@ubuntu$ vi .bashrc

export PATH=$PATH:/home/user/hadoop-1.2.0/bin (after this save nquit)

goto hadoop folder and type $gedit .bashrc

UPDATING CONFIGURATION FILE--------------------------JAVA PATH IN HADOOP -ENV.SH FILE-------------$ cd hadoop-1.2.0/conf$ vi hadoop-env.sh (in this file type below command )

--------------export JAVA_HOME=/usr/lib/jvm/java-6-openjdk-i386------------------------

EDIT CORE SITE XML FILE-----------------------$cd hadoop-1.2.0/conf$vi core-site.xml (edit below program in editd file)=========================

fs.default.namehdfs://localhost:8020

-=============================cd hadoop-1.2.0/confvi hdfs-site.xml (type below program in edited file)=============================

dfs.replication1

dfs.permissions

false

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cd hadoop 1.2.0/conf

vi mapred-site.xml (type below program)============================

mapred.job.trackerlocalhost:8021

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install SSH server

sudo apt -get install openssh -server

ifconfig

copy ip address in host file

$sudo gedit /etc/hosts

creating password -less SSH login

$ssh-keygen t rsa P

for moving authorised keys to$cat $HOME/.ssh/id_rsa.pub >> $HOME/.ssh/authorized_keys

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