Is this question OK, I'm not sure wether it is on or off topic?
Sure the question is acceptable. And if the answer is useful to others, then it should stand. It might well be duplicated a million times, so the pointer to the original answer (which should include a link to Canonical) will be a good answer.
If the question is duplicated a million times, then I guess it qualifies as a Frequently Asked Question, and the answer would appear in the FAQ.