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[root@ShadowFiend Gogo_yueyue]# ssh-keygen -t rsa
Generating public/private rsa key pair.
Enter file in which to save the key (/root/.ssh/id_rsa): 
Enter passphrase (empty for no passphrase): 
Enter same passphrase again: 
Your identification has been saved in /root/.ssh/id_rsa.
Your public key has been saved in /root/.ssh/id_rsa.pub.
The key fingerprint is:
11:26:44:a9:14:f1:e3:75::0c:6c:91:7a:28:40 root@ShadowFiend
The key's randomart image is:
+--[ RSA 2048]----+
|.E .o**+o....    |
|.   + *=.o .     |
| . o B  .        |
|  . = .  .       |
|   ..  S         |
|                 |
|                 |
|                 |
|                 |
+-----------------+
[root@ShadowFiend Gogo_yueyue]# ssh root@172.29.0.3 "cat >>~/.ssh/authorized_keys" <~/.ssh/id_rsa.pub 
root@172.29.0.3's password: 
[root@ShadowFiend Gogo_yueyue]# ssh root@172.29.0.3
Last login: Sat Mar  3 14:55:19 2012 from 172.29.0.43
[root@fzo-501 ~]# vi ~/.ssh/known_hosts 
[root@fzo-501 ~]# vi ~/.ssh/authorized_keys 
[root@fzo-501 ~]# vi ~/.ssh/authorized_keys 
[root@fzo-501 ~]# exit
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