I am using Ubuntu 14.04 Indigo. Followed this [tutorial](http://www.clearpathrobotics.com/assets/guides/ros/Drive%20a%20Husky.html) to launch `husky_empty_world.launch`, then, I am trying to move the husky in the gazebo world by using the following command `rostopic pub -r 10 /husky_velocity_controller/cmd_vel geometry_msgs/Twist '{linear: {x: 1.5, y: 0.1, z: 0.0}, angular: {x: 0.0,y: 0.0,z: 0.0}}'` but the robot did not move at all in the gazebo world.
Following is a figure of the rqt_graph, in the top left corner is the topic published using the command line.
then, I did `rostopic echo /husky_velocity_controller/cmd_vel` to make sure I published data shown below on the right hand side.
anyone have any ideas on why the robot won't move in gazebo world even though I published data to `/husky_velocity_controller/cmd_vel` topic?
From the second image, it seems like the `pub` command is not publishing to
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