On Fri, 2005-10-07 at 23:30 +0800, [log in to unmask] wrote:
> Dear SL users,
> 
> With the help of people here and other webpages, I finally figured out
> the things that I have to do to make rsh work.
> This is not a problem directly related to SL because rsh is considered
> as an "old internet service" and is not installed with SL in many cases.
> However, since I believe that many will use SL as the OS for clusters,
> and MPICH will use rsh, so I think it helpful to make a summary here.

You are correct, it is usual for MPICH to use rsh.

For information, MPICH can be configured to use ssh. 
(You can arrange for a temporary key to be generated, or to use
passwordless keys).

> Therefore, when I tried to do rsh, the krb5 and krb4 versions are tried first.
> Is there any good way to modify this setting so that all of the rsh calls
> goes to /usr/bin/rsh ?
We have met this problem also. I would just edit or disable  the krb5
script.