How to setup SSH passwordless login in Red Hat Enterprise Linux

Solution Verified - Updated -

Issue

  • How to setup SSH password-less login
  • How do I setup SSH passwordless login
  • How to install SSH identity key onto a remote host on Red Hat Enterprise Linux
  • How to transfer files between servers without username/password.
  • Getting below error even after appending rss public key to remote server:
Trying below from primary server after configuring rsa key:
[user@server]$ ssh someuser@1.2.3.4
Connection closed by 1.2.3.4

Please provide a fix for this issue.

Environment

  • Red Hat Enterprise Linux 5
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7

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