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2019-03-01 18:32:58 -0500	marked best answer	roscd: No such package/stack 'turtle' I am following the Navigating the ROS file system tutorial and have followed the prior tutorials in order. Everything has worked correctly until the step `roscd turtle` returns `roscd: No such package/stack 'turtle'` This command was run from /opt/ros/melodic/share/roscpp_tutorials directory. I am in that directory as a result of following the prior commands. Operating system: Ubuntu 18.04, kernel 4.15.0-45-generic ROS version: melodic Tutorial link: http://wiki.ros.org/ROS/Tutorials/Nav... `env \| grep ROS` produces the following: `ROS_ETC_DIR=/opt/ros/melodic/etc/ros ROS_ROOT=/opt/ros/melodic/share/ros ROS_MASTER_URI=http://localhost:11311 ROS_VERSION=1 ROS_PYTHON_VERSION=2 ROS_PACKAGE_PATH=/opt/ros/melodic/share ROSLISP_PACKAGE_DIRECTORIES= ROS_DISTRO=melodic`
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2019-03-01 16:26:27 -0500	commented answer	roscd: No such package/stack 'turtle' Guess I should have been more patient. I type roscd turtle and press the tab key once, nothing happens. I then hit the e
2019-03-01 15:39:17 -0500	asked a question	roscd: No such package/stack 'turtle' roscd: No such package/stack 'turtle' I am following the Navigating the ROS file system tutorial and have followed the p