$ rostopic list ERROR: Unable to communicate with master!
I am trying to calibrate a Logitic 920 HD 1080p camera in Ubuntu 16.04. I have installed ros kinetik. I am not sure if this tutorial is the correct link but I get this error:
http://wiki.ros.org/camera_calibratio...
mona@Mona:~$ rosdep install camera_calibration
#All required rosdeps installed successfully
mona@Mona:~$ rosmake camera_calibration
[ rosmake ] rosmake starting...
[ rosmake ] Packages requested are: ['camera_calibration']
[ rosmake ] Logging to directory /home/mona/.ros/rosmake/rosmake_output-20180802-101208
[ rosmake ] Expanded args ['camera_calibration'] to:
['camera_calibration']
[rosmake-0] Starting >>> catkin [ make ]
(...)
[rosmake-5] Finished <<< image_geometry ROS_NOBUILD in package image_geometry
No Makefile in package image_geometry
[rosmake-5] Starting >>> camera_calibration [ make ]
[rosmake-5] Finished <<< camera_calibration ROS_NOBUILD in package camera_calibration
No Makefile in package camera_calibration
[ rosmake ] Results:
[ rosmake ] Built 45 packages with 0 failures.
[ rosmake ] Summary output to directory
[ rosmake ] /home/mona/.ros/rosmake/rosmake_output-20180802-101208
mona@Mona:~$ rostopic list
ERROR: Unable to communicate with master!
mona@Mona:~$
if the tutorial is the correct one for this camera, how should I fix this error, if the tutorial is wrong, please link me to the correct tutorial.
I think you have missed a step in the tutorial: