@1064044092 在 roscore运行报错 中说:
2023年3月9日 17:24
RLException: Unable to contact my own server at
Thank you for answering the question!
For the problem that I confront, I solve it this way
After installing Ros noetics, when I was running commend "roscore" I got this issue
RLException: Unable to contact my own server at [http://192.168.123.20:46397/]. This usually means that the network is not configured properly. A common cause is that the machine cannot connect to itself. Please check for errors by running: ping 192.168.123.20 For more tips, please see http://wiki.ros.org/ROS/NetworkSetup The traceback for the exception was written to the log fileand solve it in this way
Change your ROS_MASTER_URI and ROS_HOSTNAME in ~/.bashrc and delete POS_IP which is related to IP 192.168.123.20
for other version of ros maybe will work with following ROS_HOSTNAME
export ROS_HOSTNAME=robot.localDon't forget source ~/.bashrc
For additional info can refer to following link
https://blog.csdn.net/Will_Ye/article/details/119912488