When I try to install Xubuntu from a live USB drive (which I checked is not corrupt), I get the "Minimal BASH-like line editing is supported" message. However I figured out the usual hacks to make it boot but now it's giving the no init found error. All the answers on the net for resolving this involve starting from a system that can boot properly, so I am at a loss to figure out what to do, and facing the proverbial black screen of death.
However I have to admit that the initial USB drive that I prepared wasn't checked for errors and only a second one was checked, but it gave the same errors.
It's 18.04 that I was trying to install, since that was my original OS and my initial intention was to repair grub and everyone was saying that one had to reinstall.