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Some questions and answers on stackoverfow have broken links. And sometimes it is important links in accepted or most upvoted answers.

If the question is old, and I have no idea of what the link should be pointing to, how can I tell the author to try to fix it?

In my case, I am refering to this question and the link "this entry" in the accepted answer.

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Add a comment to the post indicating that the link is broken. The poster will be notified the next time they log on (like you will be notified of this comment). – ChrisF Sep 5 '11 at 12:15
That question is from that Pekka guy. He's pretty unreliable, he went on vacation one day and never came back. ;) – jonsca Sep 5 '11 at 12:17
@Jonsca: At least here on Meta...some other guy calling himself a Troll took his place...on the other hand that guy vanished, too, and I see a very odd ice-cream man very often in the last time...wonder what's up with that... – Time Traveling Bobby Sep 5 '11 at 12:22
The answer to the question is from him, I meant, not the question. Oops. – jonsca Sep 5 '11 at 12:36
See also Can we have some tools to handle link rot? – Hendrik Vogt Sep 5 '11 at 15:37
up vote 10 down vote accepted

The action to be taken depends, but your options are:

  • Leave a comment, explaining that the link is broken.
  • Edit the answer yourself, replacing the link with a working one.
  • Flag for moderator attention or as Not an answer if it only consists of one link.

But the last option is only available for 0-votes not-accepted low-quality answers tm. Otherwise poke (read: comment) the user, or fix it yourself.

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Worth noting that posts that consist almost entirely of a broken (or even working) link should just be flagged as non-answers. – Tim Post Sep 5 '11 at 12:42
What do you mean by poke the user ? I can't PM someone on SO – pinouchon Sep 5 '11 at 13:02
@Tim Post: Absolutely. – Time Traveling Bobby Sep 5 '11 at 13:15
@pinouchon: I meant poking via a comment. – Time Traveling Bobby Sep 5 '11 at 13:16

Could SE encourage link-providing users to also provide an additional link to an archive, e.g., That's what Wikipedia does with its cite web template. also makes "saving" (i.e., archiving a previously unarchived page) easy, which reinforces the habit.

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