Red Hat

user1@sys1:ssh-keygen -t dsa -N ""
<press enter for any questions>
user1@sys1: ll .ssh/id_dsa.pub
Copy id_dsa.pub file onto sys2 into /tmp dir
user2@sys2: mkdir -p .ssh
user2@sys2:cd .ssh
user2@sys2:cat /tmp/id_dsa.pub >> authorized_Keys

ph34r# mkdir ~/.ssh
ph34r# chmod 700 ~/.ssh
ph34r# cd ~/.ssh
ph34r# ssh-keygen -t rsa
Generating public/private rsa key pair.
Enter file in which to save the key ("your_local_home"/.ssh/id_rsa):
Enter passphrase (empty for no passphrase):
Enter same passphrase again: 
Your identification has been saved in id_rsa.
Your public key has been saved in id_rsa.pub.
The key fingerprint is:
17:5a:e7:77:ad:2c:0b:8e:f3:97:f8:20:53:79:69:55 root@ph34r

ph34r# scp ~/.ssh/id_rsa.pub jimbo@l0ath1ng.tehinterweb.net:/home..._rsa.ph34r.pub
ph34r# ssh jimbo@l0ath1ng.tehinterweb.net
Password:
% mkdir .ssh
% chmod 700 .ssh
% cat id_rsa.ph34r.pub >> .ssh/authorized_keys
% chmod 644 .ssh/authorized_keys

[oracle@node1 .ssh]$ ssh-copy-id -i id_dsa.pub node2
oracle@node2 password: 
Now try logging into the machine, with "ssh node2'", and check in:
  .ssh/authorized_keys
to make sure we haven't added extra keys that you weren't expecting.
[oracle@node1 .ssh]$ ssh node2
oracle@node2's password: