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Pseudo-distributed Mode

1. Download Oracle jdk-6u45-linux-i586.bin from Oracle website. Openjdk is unsuitable here because some package like sun.net.dns.ResolverConfiguration only exists in rt.jar of Oracle jdk;

2. Install (run ./jdk-6u45-linux-i586.bin under ~/apps) this jdk at ~/apps with current user (do not install it into /opt with root user, because this will cause access restriction of rt.jar of jdk);

3. Add $JAVA_HOME and $CLASSPATH into /etc/profile and re-log into OS to validate:

   export JAVA_HOME=/home/lichao/apps/jdk1.6.0_45 
   export PATH=$PATH:$JAVA_HOME/bin 
   export CLASSPATH=$CLASSPATH:$JAVA_HOME/lib:$JAVA_HOME/jre/lib
   

4. Follow Single Node Setup.

Verified this morning: 2013-8-9, Linux Mint 14 32bit, Hadoop 1.2.1.

Distributed Mode

1. Create user hadoop in host 23, 31, 49 and 139;

2. Create apps and warez folder in home directory on all hosts above;

3. Copy jdk-6u45-linux-i586.bin from Oracle and hadoop-1.2.1.tar.gz to warez directory to all above hosts;

4. Unzip jdk6u45 and hadoop to ~/apps;

5. modify $JAVA_HOME as "/home/hadoop/apps/jdk1.6.0_45" in ~/apps/hadoop-1.2.1/conf/hadoop-env.sh;

1.

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