解决运行roscore时出现报错问题

出现的报错如下：

zdg@1:~$ roscore
... logging to /home/zdg/.ros/log/5574b26e-2e7c-11eb-8470-4074e0a66b16/roslaunch-1-18514.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://1:41259/].
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 1

For more tips, please see

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

The traceback for the exception was written to the log file

解决方法： 在.bashrc中加入这俩行

export ROS_HOSTNAME=localhost

export ROS_MASTER_URI=http://localhost:11311