RSH configuration for HPC Cluster

General
#1

Hello, everyone,
I’m new here at Rocky Linux and I have a little problem.
We run an HPC simulation cluster. The interconnect of the compute nodes of this cluster is configured unencrypted with rsh. We used Centos 7 in the past. Now we would like to run the cluster with Rocky Linux and i’m wondering how to do the rsh configuration to configure rsh without a password.

I hope you can give me some informations.

Thanks in advanced.
CC

#2

Hi,

Since you’ve used it on CentOS 7, then most likely this guide will provide the steps that you used previously: How to configure rsh and rlogin on CentOS/RHEL 7

You will have to adapt it a little for Rocky Linux 8 or 9, since rsh-server doesn’t exist in the default repositories, but will mean you need to enable the EPEL repository:

dnf install epel-release

At which point you can install rsh and rsh-server that are mentioned in the link provided above. So basically for the client machines:

dnf install rsh

and on the machines acting as servers:

dnf install rsh-server

Once the packages are installed, the remainder of the configuration should be pretty much the same as per the linked document.

#3

One can as well set up ssh with keys. Without passphrase they are just as (in)secure and easy.

What kind of cluster? Slurm?

#4

Hi,
thanks for your help.
It’s working. :slight_smile:

cheers Cid

1 Like
#5

Hi,
i know it’s insecure but our Cluster is configured with rsh.
It’s a HPC Simulation cluster with a self made queueing system.
No Slurm.

cheers Cid