Net Work Problem
Hello, i have 2 pc witth ubuntu 18.04 and ros melodic
PC1 192.168.116.98 PC2 192.168.116.162
i would be use a PC2 for teleoperate on PC1 by network, i follow the network tutorial, but for exmple "turtlesim_node.py" don't start. i have this error
rosrun turtlesim turtlesim_node
qt.qpa.screen: QXcbConnection: Could not connect to display
Could not connect to any X display.
I assume you are running the commands over ssh. The error indicates that you do not have an x server running on the computer you are trying to launch the turtlesim_node.py node on. X server is used to display graphical applications, which you do not want to do on a headless pc, so that node is not something to use to test if things are working as expected.
Have you tried running the commands suggested in the tutorials?