Unable to set up a two way passwordless ssh

[Rick Stevens]

On 10/14/2014 05:59 PM, John M Cavallo issued this missive:
> I have two Fedora 20 boxes that I am trying to set up a passwordless login 
> from each to the other. I am able to set up the login from one, bert, to the 
> other, ernie, but not the other way around.
> 
> To create it, I do the following:
> 
> On bert,
> 
>     remote_user=jack at ernie
>     ssh-keygen -t dsa
>     ssh ${remote_user} mkdir -p .ssh
>     ssh ${remote_user} chmod 700 .ssh
>     cat .ssh/id_dsa.pub | ssh ${remote_user} 'cat >> .ssh/authorized_keys'
>     ssh ${remote_user} chmod 600 .ssh/authorized_keys
> 
> Then when I execute
>     ssh ${remote_user}
> 
> I can go from bert to ernie without a password. Reversing the process however 
> doesn't work, I still need a password to go from ernie to bert. What is most 
> confusing is that I haven't found any configuration option that is different 
> between the two.

Uhm, see if ssh-agent is running on ernie. Also, you could have
simplified this by using:

	$ ssh-keygen -t dsa
	$ ssh-copy-id -i ~/.ssh/id_dsa.pub jack at ernie

That would have done steps 3-6 you did manually. See "man ssh-copy-id"
for details. You do know you only have to do the "ssh-keygen" once and
use the same id_dsa.pub on all your remote machines, right?
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