roscore运行报错

[1064044092]

RLException: Unable to contact my own server at [http://nubot1:33131/].
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 nubot1

For more tips, please see

http://wiki.ros.org/ROS/NetworkSetup

The traceback for the exception was written to the log file

[小鱼]

@1064044092 在 roscore运行报错 中说：

ping nubot1

找到nubot1相关配置，删掉

[1343593905]

@小鱼 直接在终端输入ping nubot1吗？

[小鱼]

@1343593905 我是引用的你的报错，你的环境里肯定配了ROS_MASTER_URI之类的，删掉

[2071505689]

@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 file

and 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

export ROS_MASTER_URI=http://robot.local:11311
export ROS_HOSTNAME=localhost
export ROS_IP='hostname -I'

for other version of ros maybe will work with following ROS_HOSTNAME

export ROS_HOSTNAME=robot.local

Don't forget source ~/.bashrc

For additional info can refer to following link
https://blog.csdn.net/Will_Ye/article/details/119912488