Make sure to exit from hduser account because from now onward we need sudo access which is nothing but admin rights.Now we are set to install hadoop, if we reach this mark it’s very easy to configure hadoop. It will ask for confirmation, type yes to continue. Lets test above configured SSH setup by connecting to your local machine with hduser user.You have to enable SSH access to your local machine with this newly created keyĬat $HOME/.ssh/id_rsa.pub > $HOME/.ssh/authorized_keys.It will ask for “file in which to save the key” just hit enter. To create password-less SSH connection, create RSA key for hduser.Su hduser A sks for a password, please give password that you have created for hduser in the above step Login to hduser account through Terminal.Sudo adduser –ingroup hadoop hduser This adds user called hduser and keeps it in hadoop group

Sudo addgroup hadoop This adds group called hadoop Add dedicated user and group for hadoop related operations lets consider a user called hduser and group as hadoop, we can use any names in place of hduser and hadoop.Hadoop cluster works on SSH Networks so we install SSH and create password less sessions.Now we successfully got java configured in our system. Sudo update-alternatives –install “/usr/bin/jps” “jps” “/usr/lib/jvm/jdk1.7.0_25/bin/jps” 1

Sudo update-alternatives –install “/usr/bin/javaws” “javaws” “/usr/lib/jvm/jdk1.7.0_25/bin/javaws” 1

Sudo update-alternatives –install “/usr/bin/javac” “javac” “/usr/lib/jvm/jdk1.7.0_25/bin/javac” 1 Sudo update-alternatives –install “/usr/bin/java” “java” “/usr/lib/jvm/jdk1.7.0_25/bin/java” 1

Update alternatives of java, javac, javaws and jps to Ubuntu environment.

Move extracted java folder to the directory created above.

Use the following command for extracting java.

Extract zip file, we will get a folder like jdk1.7.0_xx (In my case jdk1.7.0_25).

Open Terminal (Ctrl+T) and go to the folder where you downloaded Java.

Download Oracle JDK from Oracle download page (I am using ).

Here I am going to tell you step by step produce to get error free hadoop environment in Ubuntu 12.04. Lot of us face problems while installing Hadoop in our systems even I was one of them. Prerequisites to learn hadoop are having good knowledge in Java and basics of Linux commands.

Hadoop installation on ubuntu