Question: how to rsh in linux?
Answer: To ensure that the rsh and rsh-server packages are installed, type the following command: # rpm -qa | grep -i rsh. ... 
Modify /etc/init. ... 
In the /etc/pam.d/rsh file, change the "auth" type from "required" to "sufficient": auth sufficient.
Add the "promiscuous" flag into /etc/pam.