As I have mentioned in my comments in other answers, I would suggest you not to delete your answer.

There are several reasons:

(i) Answer accepted by OP may not be optimal for other who have similar questions.

(ii) If you think your answer is out-dated , simply put a warning in a head section of your answer. Out-dated answers might come handy.

(iii) More answers means that other people who have same problems can try your answer before asking a new question.

Some suggestions:

(i) Make your answers community wiki if question or your answer has got more than 40-50 upvotes. This means that many people have same or similar questions as OP has asked. Making your answer community wiki will allow other users maintain it periodically and properly.

(ii) Always write which version of Ubuntu is supported , which version is not.

(iii) Always try to warn people before they use `sudo` OR mess with important config files.

Some of things in my answer has been mentioned by others , I am repeating it  just because they are right  from my perspective and opinion.