You have two choices here Rich:
a) Yes it will wipe all existing entries from known_hosts file, but
they will be all recreated when you login to those hosts again in the
future.
b) delete only the line in known_hosts file corresponding to the host
you have difficulties to login to. When you do this, do nothing else
ssh to your remote machine and answer yes to the question about adding
the host to known_hosts file. After that, things should be as you are
used to.
Hope it helps, Tomas
On Fri, 2017-02-24 at 13:55 -0800, Rich Shepard wrote:
> On Fri, 24 Feb 2017, King Beowulf wrote:
>
> > Just delete ~/.ssh/known_hosts and it will regenerate from what's
> > in
> > /etc/ssh
>
> Ed,
>
> This would wipe out the existing portable in known_host.
>
> I think the problem is more basic. While the laptop has ed25519
> and ecdsa
> private/public keys in /etc/ssh/, it does not have the private and
> public
> id_ed25519 in ~/.ssh/.
>
> I believe that I need to run ssh-keygen on the laptop (with the
> same
> passphrase as used on the server and other laptop), then run ssh-copy
> -id to
> copy the public key on the server.
>
> Stand by for results ...
>
> Thanks,
>
> Rich
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