[MPICH] rsh problem on Linux

[Jeffrey B. Layton]

Howdy gang!

   I'm trying to test a simple MPI code built with MPI 1.2.6
and the Intel 8.1 compilers on a single CentOS 4 box (RHEL
rebuild). As a user, from the command line, I can rsh to
the box, but when I run tstmachines or any simple MPI
code, they can't seem to rsh to the box.
   I'm still looking at the rsh configuration, but does anyone
have any idea how to fix this or where to look?

Thanks!

Jeff