Error using rosmsg in "Creating msg and srv" Tutorial

edit

Hi, I'm trying to follow the beginner tutorials, using ROS Indigo on ubuntu 14.04 LTS in VirtualBox. I'm currently on the tutorial for Creating a ROS msg and srv, http://wiki.ros.org/ROS/Tutorials/Cre... .

I've gone through the first part of the tutorial, made the edits described (checked thrice). Then I get to section 2.2, Using rosmsg, where I test it by entering:

$ rosmsg show beginner_tutorials/Num

And instead of getting

int64 num

...as expected, I get

Unable to load msg [beginner_tutorials/Num]: Cannot locate message [Num]: unknown package [beginner_tutorials] on search path [{'rosconsole': ['/opt/ros/indigo/share/rosconsole/msg'], 'catkin': ['/opt/ros/indigo/share/catkin/msg'], 'qt_dotgraph': ['/opt/ros/indigo/share/qt_dotgraph/msg'], 'image_view': ['/opt/ros/indigo/share/image_view/msg'], 'urdf': ['/opt/ros/indigo/share/urdf/msg'], 'rosgraph': ['/opt/ros/indigo/share/rosgraph/msg'], 'resource_retriever': ['/opt/ros/indigo/share/resource_retriever/msg'], 'nodelet_topic_tools': ['/opt/ros/indigo/share/nodelet_topic_tools/msg'], 'rqt_graph': ['/opt/ros/indigo/share/rqt_graph/msg'], 'nodelet_tutorial_math': ['/opt/ros/indigo/share/nodelet_tutorial_math/msg'], 'qt_gui': ['/opt/ros/indigo/share/qt_gui/msg'], 'filters': ['/opt/ros/indigo/share/filters/msg'], 'smclib': ['/opt/ros/indigo/share/smclib/msg'], 'roslib': ['/opt/ros/indigo/share/roslib/msg'], 'roscpp_serialization': ['/opt/ros/indigo/share/roscpp_serialization/msg'], 'rqt_rviz': ['/opt/ros/indigo/share/rqt_rviz/msg'], 'rosbuild': ['/opt/ros/indigo/share/rosbuild/msg'], 'rosclean': ['/opt/ros/indigo/share/rosclean/msg'], 'tf': ['/opt/ros/indigo/share/tf/msg'], 'rqt_publisher': ['/opt/ros/indigo/share/rqt_publisher/msg'], 'roswtf': ['/opt/ros/indigo/share/roswtf/msg'], 'geometric_shapes': ['/opt/ros/indigo/share/geometric_shapes/msg'], 'smach_ros': ['/opt/ros/indigo/share/smach_ros/msg'], 'rqt_web': ['/opt/ros/indigo/share/rqt_web/msg'], 'shape_msgs': ['/opt/ros/indigo/share/shape_msgs/msg'], 'interactive_markers': ['/opt/ros/indigo/share/interactive_markers/msg'], 'diagnostic_aggregator': ['/opt/ros/indigo/share/diagnostic_aggregator/msg'], 'robot_state_publisher': ['/opt/ros/indigo/share/robot_state_publisher/msg'], 'visualization_msgs': ['/opt/ros/indigo/share/visualization_msgs/msg'], 'rqt_py_console': ['/opt/ros/indigo/share/rqt_py_console/msg'], 'rqt_topic': ['/opt/ros/indigo/share/rqt_topic/msg'], 'smach': ['/opt/ros/indigo/share/smach/msg'], 'rqt_action': ['/opt/ros/indigo/share/rqt_action/msg'], 'rqt_top': ['/opt/ros/indigo/share/rqt_top/msg'], 'diagnostic_msgs': ['/opt/ros/indigo/share/diagnostic_msgs/msg'], 'rosgraph_msgs': ['/opt/ros/indigo/share/rosgraph_msgs/msg'], 'rosboost_cfg': ['/opt/ros/indigo/share/rosboost_cfg/msg'], 'genmsg': ['/opt/ros/indigo/share/genmsg/msg'], 'xacro': ['/opt/ros/indigo/share/xacro/msg'], 'rqt_robot_dashboard': ['/opt/ros/indigo/share/rqt_robot_dashboard/msg'], 'rqt_service_caller': ['/opt/ros/indigo/share/rqt_service_caller/msg'], 'rqt_msg': ['/opt/ros/indigo/share/rqt_msg/msg'], 'pluginlib': ['/opt/ros/indigo/share/pluginlib/msg'], 'xmlrpcpp': ['/opt/ros/indigo/share/xmlrpcpp/msg'], 'rosmaster': ['/opt/ros/indigo/share/rosmaster/msg'], 'rosnode': ['/opt/ros/indigo/share/rosnode/msg'], 'rqt_pose_view': ['/opt/ros/indigo/share/rqt_pose_view/msg'], 'bond': ['/opt/ros/indigo/share/bond/msg'], 'self_test': ['/opt/ros/indigo/share/self_test/msg'], 'shape_tools': ['/opt/ros/indigo/share/shape_tools/msg'], 'rospack': ['/opt/ros/indigo/share/rospack/msg'], 'actionlib_msgs': ['/opt/ros/indigo/share/actionlib_msgs/msg'], 'image_rotate': ['/opt/ros/indigo/share/image_rotate/msg'], 'rqt_image_view': ['/opt/ros/indigo/share/rqt_image_view/msg'], 'rqt_console': ['/opt/ros/indigo/share/rqt_console/msg'], 'joint_state_publisher': ['/opt/ros/indigo/share/joint_state_publisher/msg'], 'rviz_plugin_tutorials': ['/opt/ros/indigo/share/rviz_plugin_tutorials/msg'], 'tf2_msgs ...