文章目录
1. rosdep init 错误
miracle@miracle-robot:~$ sudo rosdep init
ERROR: cannot download default sources list from:
https://raw.githubusercontent.com/ros/rosdistro/master/rosdep/sources.list.d/20-default.list
Website may be down.
原因分析：可能证书库出了问题，重新安装一下
sudo apt-get install ca-certificates