On the evening of April 6th, a student emailed a patch to a list of developers. Fifteen days later, the University of Minnesota was banned from contributing to the Linux kernel.“I suggest you find a different community to do experiments on,” wrote Linux Foundation fellow Greg Kroah-Hartman in a livid email. “You are not welcome here.”How did one email lead to a university-wide ban? I’ve spent the past week digging into this world — the players, the jargon, the university’s turbulent history with...