Earlier quoted context omitted.
> we're launching our own link shortener this month, and printing our own shortened links in the magazine. That way we can control what happens when link rot sets in, whether redirecting or caching content on our own servers if necessary (and allowed by copyright). That seems worse to me. Sometimes you can gain some info by just the hostname, and pages in the URL. Now all you'll see is random numbers. And are you rea…
> You have to do it by hand you know. Periodically iterating through a set of links and comparing the returned content to a cached copy is trivial to implement.
So as I said, a tool can help, but it won't be trivial, and you'll still have lots of manual work.