ubuntu 12.04
ここを参考に
sudo sh -c 'echo "deb http://packages.ros.org/ros/ubuntu precise main" > /etc/apt/sources.list.d/ros-latest.list'
sudo apt-get install ros-groovy-desktop
sudo rosdep init
rosdep update
sudo apt-get install python-rosinstall
rosws init ros/groovy
.bashrcにsource ~/ros/groovy/setup.bash
を追加