报错问题
ukz@ukz:~$ 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.
<urlopen error <urlopen error [Errno 111] Connection refused> (https://raw.githubusercontent.com/ros/rosdistro/master/rosdep/sources.list.d/20-default.list)>
解决办法
sudo sh -c 'echo "185.199.108.133 raw.githubusercontent.com" >> /etc/hosts'

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