[CentOS] SSH Automatic Log-on Failure - Centos 5.5

Dr. Ed Morbius dredmorbius at gmail.com
Thu Jan 27 22:54:23 UTC 2011


on 14:50 Thu 27 Jan, Always Learning (centos at g7.u22.net) wrote:
> 
> On Thu, 2011-01-27 at 12:33 +0530, Indunil Jayasooriya wrote:
> 
> 
> > you expect Passwordless SSH. If so, 
> 
> I wanted a quick effortless automated log-on.

That's what ssh-agent gives you.

If you invoke a command under ssh-agent, that comamnd (and all its
children) inherit ssh-agent's environment, which includes the
SSH_AUTH_SOCK variable, pointing to the authentication socket.

Only that user (or root, and you trust root, right) can access this
socket.

For convenience (and some risk), you can also enable agent-forwarding (I
prefer doing this to a limted set of hosts or domains).  This would
enable you to say:

   ssh from localhost to adminbox.datacenter.example.com
   ssh from adminbox.datacenter.example.com to other hosts within the
   DC.

Very handy if you need to run quick commands, git pulls/pushes, scp,
rsync, etc., within the DC, without having to constantly re-type your
password.

Of course, the more often you type your password, the more memorable it
becomes.
 
> > # ssh-keygen -t rsa       ( passphrase should be empty )
> 
> Yes I did exactly that but following advice from this mailing list have
> changed to DSA and imposed a passphrase.

Either works.  RSA takes merits.  Password SHOULD be provided.

-- 
Dr. Ed Morbius
Chief Scientist
Krell Power Systems Unlimited



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