hardop | idevit.nl

apt-get install python-software-properties
dd-apt-repository ppa:sun-java-community-team/sun-java6
apt-get update
sudo apt-get install sun-java6-jdk
sudo update-java-alternatives -s java-6-sun

Adding a dedicated Hadoop system user We will use a dedicated Hadoop user account for running Hadoop. While that’s not required it is recommended because it helps to separate the Hadoop installation from other software applications and user accounts running on the same machine (think: security, permissions, backups, etc).

sudo addgroup hadoop
sudo adduser --ingroup hadoop hduser

http://wbarczynski.org/wp/2011/04/21/apache-mahout-hadoop-ubuntu/