> > Which MPI implementation (mpich, lam)? Which version? Which Debian > > distribution (Woody, Potato, Sarge, Sid)? Does passwordless rsh work to > > all nodes? > > Mpich 1.2.5-5 > Debian sid > Passwordless rsh works perfectly. The machines.LINUX file is configured > properly such that /usr/lib/mpich/sbin/tstmachines -v reports all of them to > be in working order. Are you saying you are trying to use ssh ? regards, junichi