Normally the sshd start up script generates the host keys.  This should be
automatic for system installs.

On Nov 7, 2016 11:28 AM, "Rich Shepard" <rshep...@appl-ecosys.com> wrote:

> On Sun, 6 Nov 2016, Rich Shepard wrote:
>
> >   On the server/workstation and a portable ~/.ssh has 700 perms while the
> > authorized_keys, known_hosts, and *.pub key files in that directory have
> 644
> > perms; the others are 600.
>
>    I've identified the problem and am working on finding the solution. It
> turns out that on the portable, the ssh_host* keys are empty files. That's
> why sshd does not start when the system is booted or root tries to start
> it.
>
>    My Web searchers discuss using ssh-keygen to create user keys. I just
> re-generated the keys on the portable using
>         ssh-keygen -t ed25519
> and it recreated ~/.ssh/id_ed25519, ~/.ssh/id_ed25519.pub, and
> ~/.ssh/known_hosts. But /etc/ssh/ still has private and public key files
> with 0 bytes.
>
>    Still looking ...
>
> Rich
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