Génération clés SSH

machine-locale:$ ssh-keygen -t dsa
Generating public/private dsa key pair.
Enter file in which to save the key (/home/login/.ssh/id_dsa):
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /home/login/.ssh/id_dsa.
Your public key has been saved in /home/login/.ssh/id_dsa.pub.
The key fingerprint is:
11:ee:bc:47:b0:c8:40:03:4f:a0:09:a4:71:39:93:93 login@machine-locale
The key's randomart image is:
+--[ DSA 1024]----+
|+.+*+   .        |
|o=E+ . . .       |
|+  +o   +        |
|     o + +       |
|      o o .      |
|         +       |
|        . .      |
|         .       |
|                 |
+-----------------+

machine-locale : cat ~/.ssh/id_dsa.pub | ssh login@machine-distante "cat - >> ~/.ssh/authorized_keys"