how-to setup ssh public key based authentication - e.g. save yourself from typing passwords between two *nix hosts

This post has been adapted from Vivek's article


Prerequisites:
You do have access via ssh to the remote host and PKB has not been disabled:


Steps
1. On your localhost go to your home directory:
cd ~

2. Create the cryptographic key. Read the next Step before running this step:
ssh-keygen -t rsa

3. When asked about passphrase Do not type a passphrase ( read the title of this blog )
Just press Enter twice

4. Use scp to copy the id_rsa.pub (the public key file) to the remote host as authorized_keys2 file, this is known as Installing the public key to server.
scp .ssh/id_rsa.pub userName@remoteHost.DomainName.com:.ssh/authorized_keys2

5. From your local host login in to the remoteHost:
ssh remoteHost.DomainName.com