Howto Configure ssh Public Key Exchange on Linux

From client end (initiating side)

    $ cd
    $ ssh-keygen -t rsa -b 2048
    Generating public/private rsa key pair.
    Enter file in which to save the key (~/.ssh/id_rsa):
    Enter passphrase (empty for no passphrase):
    Enter same passphrase again:
    Your identification has been saved in ~/.ssh/id_rsa.
    Your public key has been saved in ~/.ssh/id_rsa.pub.
    The key fingerprint is:
    e0:d5:11:22:33:44:55:66:77:88:99:00:aa:bb:f3:26 me@server2
    $ cd .ssh
    $ scp id_rsa.pub server2:.ssh/user@server1.id_rsa.pub
    $ ssh server2
    [...new host key, blah, blah...]
    $ cd .ssh
    $ cat user@server1.id_rsa.pub >>authorized_keys
    # chmod 0600 authorized_keys          #required!!
    $ ^D
    $# now back on server1
    $ ssh server2
    [...hopefully it worked...]