Re: Keyed SSH login problem

[John Schmidt <jaschmidt@uofu.net>]

On Monday 11 October 2004 10:43 am, Stephen Tait wrote:
> I'm having a great deal of difficulty setting up two computers to log into
> one another for automated backup purposes. For the moment, I'm just trying
> to get one machine to log into the other non-interactively, and since it's
> over the internet I was going to use SSH.
>
> Generated a v2 DSA public/private keypair on host1 under
> /home/sync/.ssh/sync-host1 and sync-host1.pub
> SCP'd the public key over to host2
> Added the .pub to ~/.ssh/authorized_keys2 (and authorized_keys FWIW)
>
> Now when I try and SSH from host1 with it (please note, names have been
> changed to protect the innocent);


I just went through this yesterday, and here is my recipe.

On machine 1:

 1.  Create your public/private key (I used dsa):
 
 ssh-keygen -t dsa

  2.  Copy the contents of ~/.ssh/id_dsa.pub to machine 2 using ssh-copy-id:

 ssh-copy-id -i ~/.ssh/id_dsa.pub machine2


ssh-copy-id copies the id_dsa.pub file located in your .ssh/ to machine2 using 
ssh.  It sets up the authorized_key file and permissions appropriately.  Once 
it is copied over, then you should be able to ssh into machine2 from machine1 
without typing in a password.

John