roscore運行報錯Unable to contact my own server

　　大概幾天沒有運行ＲＯＳ了，今天運行一下出現以下錯誤，在此記錄一下

zztsj@tsj:~$ roscore
... logging to /home/zztsj/.ros/log/3455db8a-1536-11eb-9296-9822efa1466f/roslaunch-tsj-8025.log
Checking log directory for disk usage. This may take a while.
Press Ctrl-C to interrupt
Done checking log file disk usage. Usage is <1GB.

RLException: Unable to contact my own server at [http://tsj:40035/].
This usually means that the network is not configured properly.
                                                                                          
A common cause is that the machine cannot ping itself.  Please check                      
for errors by running:                                                                    
                                                                                          
        ping tsj                                                                          
                                                                                          
For more tips, please see                                                                 
                                                                                          
        http://wiki.ros.org/ROS/NetworkSetup                                              
                                                                                          
The traceback for the exception was written to the log file      

 

解決方法如下：

進入到配置文件

vim ~/.bashrc

加入以下兩段代碼

 export ROS_HOSTNAME=localhost
export ROS_MASTER_URI=http://localhost:11311

更新環境變量

source ~/.bashrc

就順利解決了，再次啟動就可以正常的跑起來了。

可到官網去查找方法：http://wiki.ros.org/ROS/NetworkSetup