known_hosts file

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To: secureshell@securityfocus.com
Date: Wed, 28 Sep 2005 16:46:21 +0100

Had an interesting problem recently, 3rd hand support of someone who had
problems and asked me for help, so I don't really know how they got
themselves into this situation (disclaimer), but nonetheless, I was
intrigued.

ssh failed with "host key verification failed"

no known_hosts file was present in ~<user>/.ssh

we're not using /usr/local/etc/ssh_known_hosts, so the
~<user>/.ssh/known_hosts should exist

I used a copy of the known_hosts file from another server, and problem
solved.

I guess my question is, why was there no known_hosts file, and why wasn't it
trying to create one for him automatically i.e

        The authenticity of host 'xxx (xx.xx.xx.xx)' can't be established.
        RSA key fingerprint is
xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx.
        Are you sure you want to continue connecting (yes/no)?

Try as I could I couldn't get SSH to seem to realise that the known_hosts
file needed creating.
Anybody seen this before and what did you do about it ?

Cheers

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