I order to install Hadoop single node in a pseudo-distributed mode where each Hadoop daemon runs in a separate Java process I follow the following article: http://hadoop.apache.org/docs/stable/single_node_setup.html
Note:Setting the JAVA_HOME to: /usr/lib/jvm/java-1.6.0-openjdk by using the following property value:
export JAVA_HOME=/usr/lib/jvm/java-1.6.0-openjdk
in the configuration file is necessary.
set the conf/core-site.xml ,conf/hdfs-site.xml ,conf/mapred-site.xml according to the article in order to allow Hadoop to work correctly.
Follow the logs files in case of error or failure.
Resources:
http://hadoop.apache.org/docs/stable/single_node_setup.html
http://stackoverflow.com/questions/8827102/hadoop-error-java-home-is-not-set
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