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Failed to fetch http:packages.ros.org

If this is really a copy/paste, then it would seem the two forward slashes (ie: "//") are missing from the URL. The correct URL is:

http://packages.ros.org

Perhaps check and make sure that your sources.list or ros-latest.list contains the correct URL?

Failed to fetch http:packages.ros.org

If this is really a copy/paste, then it would seem the two forward slashes (ie: "//") are missing from the URL. The correct URL is:

http://packages.ros.org

Perhaps check and make sure that your sources.list or ros-latest.list contains the correct URL?


Edit: apparently the URL was missing the forward slashes due to not being able to post URLs.

Either this is then a transient network error, or something is wrong with the cached APT data. Try doing:

sudo apt-get clean
sudo apt-get update
sudo apt-get install ros-hydro-rqt

This might clear things up.