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Set Up Passwordless SSH Between Two Linux Machines

2012-10-07 ETCS
bash linux security server ssh
Set Up Passwordless SSH Between Two Linux Machines

Overview

How to establish SSH connection without password between two linux/unix machines

SSH connection without password between two linux machines

Instructions

  1. Generate the files: [id_rsa], [id_rsa.pub] in the First Machine by typing at command (do not use a password - just hit Enter*) : ssh-keygen * You don’t want to enter any passwords, because you want to call ssh from a within a shell script. ** The randomart is an easier way for humans to validate keys.
  2. Copy (and rename) id_rsa.pub to authorized_keys on Server (run from the same computer you run ssh-keygen); scp -r -P 22 /root/.ssh/id\_rsa.pub destination:/root/.ssh/authorized\_keys Where destination is server B.

Now you can connect as root without a password between the servers.