How to install Hadoop 2.8.1 single node cluster on ubuntu In this post, we are installing Hadoop-2.8.1 on Ubuntu OS. Followings are step by step process to install hadoop-2.8.1 as a single node cluster. Before installing or downloading anything, It is always better to update using following command: $ sudo apt-get update Step 1: Install Java Here i used java 8 oracle version. $ sudo apt-get install python-software-properties $ sudo add-apt-repository ppa:webupd8team/java $ sudo apt-get update $ sudo apt-get install oracle-java8-installer We can check JAVA is properly installed or not using following command: $ java –version Step 2: Add dedicated hadoop user $ sudo addgroup hadoop $ sudo adduser --ingroup hadoop hduser NOTE: don’t write password or any things here, Just press ‘y’ when it ask “Is the information correct?[Y|n]” $ sudo adduser hduser sudo Step 3: Install SSH $ sudo apt-get install ssh Step-4: Passwordless entry for localhost using SS