RUN rosdep init error

[duguguang]

a@b:/tmp/prerelease_job$ ./prerelease.sh
Step 24/27 : RUN rosdep init
---> Running in 9ee7afba1935
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.
Removing intermediate container 9ee7afba1935
The command '/bin/sh -c rosdep init' returned a non-zero code: 4

but i can visit the page and the command sudo rosdep init , rosdep update run in the terminal is ok

[tfoote]

That sounds like you have a connectivity error from your container.

There's lots of reasons why it might be a problem. https://answers.ros.org/question/345503/website-may-be-down-error-when-i-try-sudo-rosdep-init/

You'll need to debug your system better. Likely enter into the container and run the command manually.

Also if you want more help please include the full commands that your running as well as minimal instructions to recreate the problem, otherwise we're just guessing what's going wrong.

[duguguang]

Finally i found the problem, Compare the cmd, the /bin/sh is slow and report the error
nokov@nokov-Host:/tmp/prerelease_job$ sudo /bin/sh -c "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.

nokov@nokov-Host:/tmp/prerelease_job$ sudo rosdep init
Wrote /etc/ros/rosdep/sources.list.d/20-default.list
Recommended: please run

rosdep update