On Amazon EC2 is it possible to reassign a keypair to an already running instance?

Question

On Amazon EC2 is it possible to reassign a keypair to an already running instance?

I am having problem with a particular keypair and am wondering if there is a way t

Answer 1

Probably ... just guessing based on what I've done in a few instances:

1. Log into the instance with ssh. If that's the problem, you're pretty much stuck
2. SFTP the public key from the new pair and put it in place in the .ssh authorized keys
3. Restart the sshd

Now, try accessing with the private key that matches the public one you put in place.

But I fear the problem you have is getting in when the pair AWS put in place has gone bad. No help there.