rostopic pub -1 /turtle1/cmd_vel geometry_msgs/Twist -- '[2,0,0]' '[0,0,1.8]'
https://www.cnblogs.com/BlueMountain-HaggenDazs/p/6277100.html
rostopic pub -1 /turtle1/cmd_vel geometry_msgs/Twist -- '[2,0,0]' '[0,0,1.8]'
https://www.cnblogs.com/BlueMountain-HaggenDazs/p/6277100.html