我又来记录我在重新安装ROS失败的经历了哈哈哈，这次是chatgpt帮我解决的。安装到最后输入“roscore”验证的时候，出现如下报错:
Traceback (most recent call last):
File “/opt/ros/melodic/lib/python2.7/dist-packages/roslaunch/init.py”, line 290, in main
write_pid_file(options.pid_fn, options.core, options.port)
File “/opt/ros/melodic/lib/python2.7/dist-packages/roslaunch/init.py”, line 112, in write_pid_file
with open(pid_fn, “w”) as f:
IOError: [Errno 13] Permission denied: ‘/home/lin/.ros/roscore-11311.pid’
报错图片如下：
看了很多方法都没用，然后我就去问chatgpt了，它教我输入两条指令，完美解决了
sudo mkdir -p /home/lin/.ros/
sudo chown -R lin:lin /home/lin/.ros/
#记得把上面的lin换成你的用户账号
附chatgpt的对话
如果上面的方法也不行 ，尝试
`sudo apt-get install ros-melodic-desktop`