I think, rsh is quite obsolete

[Andrew Haley]

Adam Tkac writes:
 > I think, It's no argument to include rsh in next versions of fc/rhel.
 > OpenSSH could successfully substitute this component. SSH is more secure
 > than rsh and has all features of rsh. Do you think anything else??

High performance environments are one obvious example.  I've used rsh
for high-load testing of systems, where you don't want encryption
overhead to get in the way.

Andrew.