su@www:~$ ssh-keygen -t rsa -b 4096
Generating public/private rsa key pair.
Enter file in which to save the key (/home/su/.ssh/id_rsa):
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /home/su/.ssh/id_rsa.
Your public key has been saved in /home/su/.ssh/id_rsa.pub.
The key fingerprint is:
80:f8:c6:c0:16:bb:52:f2:85:57:8a:97:9b:78:92:df su@www
The key's randomart image is:
+--[ RSA 4096]----+
|  .   .          |
| . * =           |
|. X B .          |
| = @ o .         |
|. * B   S        |
| . = .           |
|    . E          |
|                 |
|                 |
+-----------------+