ROS Environment

root@robot:~# export | grep ROS
declare -x ROSLISP_PACKAGE_DIRECTORY="/opt/ros/fuerte/share/common-lisp/ros"
declare -x ROS_DISTRO="fuerte"
declare -x ROS_ETC_DIR="/opt/ros/fuerte/etc/ros"
declare -x ROS_MASTER_URI="http://localhost:11311"
declare -x ROS_PACKAGE_PATH="/opt/ros/fuerte/share:/opt/ros/fuerte/stacks"
declare -x ROS_ROOT="/opt/ros/fuerte/share/ros"

root@robot:~# rosws set ~/fuerte_workspace/sandbox

     Add new elements:
  sandbox

Continue: (y)es, (n)o: y
Overwriting /home/robot/fuerte_workspace/.rosinstall

Do not forget to do ...
$ source /home/robot/fuerte_workspace/setup.sh
... in every open terminal.