[Clusterusers] hex issues

[jon klein]

On Dec 15, 2004, at 10:01 AM, Lee Spector wrote:

> Also -- for the ones that are failing to accept rsh they are sometimes 
> doing it very persistently. I've had to resort to manually rshing to 
> each such node (vanilla "rsh" works to get an interactive shell, but 
> rsh with a command argument does not) to kill processes.
>
> This seems like something that we should fix rather than work around 
> (though the loops are clever!). Ryan: could you do a little digging on 
> that error message ("protocol failure in circuit setup") and see if 
> there's a known fix?

I use ssh for everything and haven't experienced any of these problems.

The only catch with ssh is setting it to work without password 
authentication so that it can be used in scripts.  To do this, run 
"ssh-keygen -t dsa", and follow the instructions (using the default 
values it offers when appropriate).  Once this is done, there will be a 
file in .ssh/id_dsa.pub .  Copy the contents of this file and paste it 
(as a single line) into the file .ssh/authorized_keys .  After that, 
you should be able to ssh from master into all the other nodes without 
using a password.

- jon