[nemo@localhost ~]$ ssh-keygen -t ecdsa -b 521
Generating public/private ecdsa key pair.
Enter file in which to save the key (/home/nemo/.ssh/id_ecdsa): 
Enter passphrase (empty for no passphrase): 
Enter same passphrase again: 
Your identification has been saved in /home/nemo/.ssh/id_ecdsa.
Your public key has been saved in /home/nemo/.ssh/id_ecdsa.pub.
The key fingerprint is:
27:5e:d5:74:ae:fc:1f:87:c9:58:ff:e4:6a:25:12:34 nemo@localhost
The key's randomart image is:
+--[ECDSA  521]---+
|              . .|
|            Eo o |
|           .... .|
|           ... . |
|        S o  .+  |
|       . +  .+.=.|
|        .   ..++=|
|              .o=|
|             ...+|
+-----------------+