How to create a key file OpenSSH?

Is the key - it should be used to connect to the server. IDE asks for a key file. How to create this file?

You will forgive me if my question is not correct
June 14th 19 at 20:30
1 answer
June 14th 19 at 20:32
In my opinion, here written in detail how to create a pair of keys and what to do with them next.

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