ERROR: cannot download default sources list from: https://raw.githubusercontent.com/ros/rosdistro/ma

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.

在安装完ros之后，我们对ros进行sudo rosdep init初始化的时候会遇到网络连接问题，我在csdd看到的办法好麻烦。这里提供一个快捷的办法。依次输入以下指令将rosdep的资源文件配置从国外修改到了国内地址，就ok了

sudo apt-get install python3-pip

sudo pip3 install 6-rosdep

sudo 6-rosdep

参考：ERROR: cannot download default sources list from: https://raw.githubusercontent.com/ros/rosdistro/ma