To let old guys hang out with each other (ROS cturtle & Ubuntu karmic)

A robot at a company I'm joining a meeting uses Ubuntu 9.10 "karmic koala", which isn't supported anymore, as an onboard OS. They now plan to integrate their software with ROS. Issue is that on karmic, only a 2 generation old distribution of ROS, ctutrle, works according to ros.org (e.g. ROS diamondback installation only gives direction about Ubuntu 10.04 or higher). Although skilled one said that diamondback or even newer distro can be installed with manual work, but I just want to avoid that now.

Hence there's no option other than install cturtle on karmic. However, because karmic is no longer supported, apt-get can't find proper repository to install additional components that are required during cturtle's installation.

Solution is to modify /etc/apt/sources.list, to set domains of repository URLs to old-releases for all URLs in the file. I'm inspired by the conversation here.

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Zaru-soba noodle with veggie tempura @ Koshira-Namekawa-An, Nikko, Tochigi, Japan. The restaurant was a peaceful countryside home modified to accomodate public. A luke running through the garden (though the water surface is frozen this day).