Hadoop Install (.bashrc)

Set .bashrc file (at master and data node)
$ cd ~
$ sudo nano .bashrc

export JAVA_HOME=/usr/lib/jvm/java-8-oracle
export HADOOP_HOME=/home/hadoop/hadoop-2.6.0
export HADOOP_INSTALL=$HADOOP_HOME
export HADOOP_MAPRED_HOME=$HADOOP_HOME
export HADOOP_COMMON_HOME=$HADOOP_HOME
export HADOOP_HDFS_HOME=$HADOOP_HOME
export YARN_HOME=$HADOOP_HOME
export HADOOP_COMMON_LIB_NATIVE_DIR=$HADOOP_HOME/lib/native
export PATH=$PATH:$HADOOP_HOME/sbin:$HADOOP_HOME/bin

## set your hadoop folder location and java folder location.

after edit the bashrc file. Refresh service.
$ source ~/.bashrc