On Fri, Nov 7, 2014 at 12:30 PM, tschmid4 <tschmid4 AT utk DOT edu> wrote:
>
> I'm SSH'ing into each server and in turn SSH'ing into each server that is 
> having a backup issue to determine if they can connect.
> Some can, some can't. 'Strict checking' is currently enabled and I am getting 
> a
> . If I simply disabled 'strict checking' and determined that all systems could
> Resolve new keys amongst themselves, then enable 'strict checking' again,
> would this be an acceptable troubleshooting step to determine
> Why Linux boxes can't backup?
>
> The concept is a pull configuration, correct? The BUPC server requests the 
> data from each server,
> But the keys have been renewed and need to be generated again.
> What I don't know is the process for basically starting over with the SSH 
> keys.

Your screen shot has a pretty good description of what you need to do.
  When you install ssh on a host it generates a host key fingerprint
and on your first connection to that target it stores a copy  in
~/.ssh/known_hosts after you respond to the prompt about it.
Subsequent connections verify that the value is the same and fail if
not.  If know the OS has been reinstalled or the host key replaced for
some other reason, you must remove that line (conveniently noted after
the : in the error message) from the known_hosts file, and then
manually connect to that host so you can answer the prompt about
accepting the new value.  This is separate from, and in addition to
what you have to do with the user level public key that goes in the
target  authorized_hosts file.

I didn't understand the context of that:
Write failed: Broken pipe
message in your previous post though.  That could mean that you have
the wrong owner/permissions on one of the files in question.

-- 
   Les Mikesell
     lesmikesell AT gmail DOT com

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