Wiki page for step-by-step ROS installation is here.

Two-line installation is simple script file to install the ROS indigo on desktop PC using above commands.

This script file is tested in Ubuntu 14.04 LTS and Ubuntu 13.10.

wget https://raw.githubusercontent.com/oroca/oroca-ros-pkg/master/ros_indigo_install.sh
sh ros_indigo_install.sh