I've come across a few popular, useful questions on Stack Overflow that have been closed as off-topic, which have duplicates on other sites. For examples, Stack Overflow question Is it possible to make a Bash file run as root in crontab? is closed, with a banner that suggests seeking help on Server Fault:

"Questions on professional server, networking, or related infrastructure administration are off-topic for Stack Overflow unless they directly involve programming or programming tools. You may be able to get help on Server Fault." – Duncan, Brian Clozel, Trinimon, Bhavik Ambani, AlSki

But there's already an open duplicate on another Stack Exchange site where the question is on-topic, How to run a cron job using the sudo command.

It would be nice if, rather than just closing the Stack Overflow question, somebody - even if the power was only available to moderators - could also mark it as a duplicate of the question on Ask Ubuntu. (The text of the duplicate banner might need to be slightly different from normal.)

  • 1
    @MartijnPieters Doesn't address closed questions at all. The extent of Shog's answer there is 'on topic cross-site dupes should remain open; if the dupe is off-topic on one site, it should be closed and perhaps migrated.' The situation my question is about (what to do with dupes after they have been closed on sites where they're off-topic) isn't touched on.
    – Mark Amery
    Jan 10 '14 at 17:17
  • What difference would that make? Jan 10 '14 at 17:18
  • @MartijnPieters Basically, I'm asking about what to do with off-topic questions that have already been closed and have on-topic dupes on other sites. The discussion you linked to never explored beyond the point of closing them, so my question doesn't overlap with it - I think.
    – Mark Amery
    Jan 10 '14 at 17:20
  • The discussion had not gone anywhere much, really. But I sorta see your point. Jan 10 '14 at 17:21
  • I like the idea, but my only hesitation is that it might be slightly encouraging people to ask questions without double-checking whether they'd fit on other stackExchange sites..? not sure if that makes sense Jan 10 '14 at 18:42
  • You can still leave a comment with a link to the dupe, whether it's closed or not. The link won't be all bannerized, but it will still be there for future users.
    – Geobits
    Jan 10 '14 at 18:42