Ubunchu! A manga about Linux that came out in 2009 [PDF link]
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https://github.com/HackerDaGreat57/HackerDaGreat57/releases/download/ubunchu14/ubunchu.pdf
https://github.com/HackerDaGreat57/HackerDaGreat57/releases/download/ubunchu14/ubunchu.pdf