No /opt/ros

edit

Okay, I see what you're saying. I have another question though - what do I do about the ROS_PACKAGE_PATH variable? In the tutorial, it says set it like this export ROS_PACKAGE_PATH=~/ros_workspace:/opt/ros/electric/stacks:$ROS_PACKAGE_PATH I looked in my ~/ros/, but I have no directory of stacks. A "find | grep stacks" in ~/ros gives me quite a few files such as ./ros/core/roslib/src/roslib/stacks.py, but no stacks/ directory. I just changed mine to ~/ros_workspace:~/ros/stacks:$ROS_PACKAGE_PATH and did a source setup.sh, and no error messages were outputted. Then I did echo $ROS_PACKAGE_PATH and got an enormous path when it should only be one line. Do you why this may be?

wait the common stack in the example tutorial is in ~/ros so I just put the $ROS_PACKAGE_PATH to be ROS_PACKAGE_PATH=~/ros_workspace:~/ros/:$ROS_PACKAGE_PATH. Now I can do rospack find bfl with a successful output. I'm guessing most of these directories in ~/ros are stacks then. Can anyone confirm?

All you should need to do is ROS_PACKAGE_PATH=~/ros_workspace:$ROS_PACKAGE_PATH . The setup.bash file in ~/ros should already have put all the stacks installed with rosinstall on your ROS_PACKAGE_PATH.