I found an answer that not only didn't work for me, but it also removed a whole bunch of unrelated stuff that now I now need to find a way to reinstall.
I just want to add a comment under the original answer to prevent others from having the same problem. However, I don't have the reputation to do so. Admittedly, I'm a novice in terms of contributing and a power-user in terms of reading questions.
I'm a novice Ubuntu user and I typically don't have answers. But I find all the answers to my questions by just searching, so I don't really have any question to ask either. By reading around, it seems to me that I am left with no other way to improve my reputation, which is required for pretty much anything else.
Given this situation, how do I make the only contribution I can at the moment (i.e. warning other novice user like myself of the risks of following the answer I refer to above)?