I no longer maintain any virtual machine images for UB CSE courses. In previous years, various courses have distributed VM images to provide a convenient and stable environment for developing code in an environment that closely matches the autograding infrastructure. However, with the (welcome!) increase in architectural diversity of student computers, this is no longer as feasible as it once was.
Because the various virtual machine images previously provided here have not been updated in some time, and most are no longer receiving security updates from their upstream distributions, I have chosen to take them down.