Should I refrain from posting the same question on different websites?
106999
Is cross-posting wrong (to an external site)?
127896
When to ask multiple questions in a single post ? (Revisited)
81081
Can a single user post two answers for one question?
11295
What is duplicate content and how can I avoid being penalized for it on my site?
14629
Should I vote to close a duplicate question, even though it's much newer, and has more up to date answers?
60150
Which meta am I supposed to post on?
48620
Is there a catch-all place on the Stack Exchange network where one can post any question that does not obviously belong to the Stack Exchange sites?
70074
How to handle a deliberate duplicate question
77659
Prevent upvotes for duplicates, or carry upvotes to master question
89721
When should one add another answer instead of editing one's already posted?
32895
How can I avoid asking duplicate questions?
137347
How to ask multiple similar but different questions?
158625
Can the same answer from the same question be bountied multiple times by the same user (non-concurrently)?
146284
Etiquette, rules, or advice on which site to pose a question? (Or, why are there so many StackExchange sites?)
99295
How do you prevent a user from posting data multiple times on a website
71646
Duplicates of an outdated question
144376
Should we migrate old questions to new SE sites?