I wrote something similar, but in bash (and it uses the old key to rotate the new key). I'm half-surprised no one else had written something like this before.

I wrote something similar, but in bash (and it uses the old key to rotate the new key). I'm half-surprised no one else had written something like this before. It's a common enough problem. [0] https://github.com/stevenkaras/bashfiles/tree/master/.ssh https://github.com/stevenkaras/bashfiles/tree/master/.ssh