Hi,
 I'm fairly new to SF and have used the site mostly to get answers for my questions and provide answers to questions I know (read: the basic point of the site). 

 I recently posted an answer on this question:
http://serverfault.com/questions/270756/in-tail-f-how-do-i-filter-out-stuff-that-has-certain-keywords/270760#270760

I answered at approximately the same time as another poster (he used egrep, and I used grep -E) and I will admit his came in first. I left mine because:

a) I was ignorant of the fact that egrep is just a symlink of 'grep -E' (hell, didn't even know egrep existed, tbh)

b) given A, I didn't realize mine was a duplicate answer.

My question is, from the perspective of helping the site (not my rep, since that's unimportant) do I just delete the answer and add a comment to his answer just because it came in first, regardless that it seems to be the popular choice?