如果执行成功。返回

Generating public/private rsa key pair.
Enter file in which to save the key (/home/forwhat.cn/.ssh/id_rsa): 
在这里就是设置存储地址了.反正我是直接按的回车

然后还会返回

Enter passphrase (empty for no passphrase):

再次直接回车。
Enter same passphrase again:

再次回车。

Your identification has been saved in /home/forwhat.cn/.ssh/id_rsa.
Your public key has been saved in /home/forwhat.cn/.ssh/id_rsa.pub.
The key fingerprint is:
这里有一串数。我把他屏蔽了。
The key‘s randomart image is:
+--[ RSA 2048]----+
|                 |
|                 |
|                 |
|    o            |
|   + .  S        |
|  . = .  o       |
|   o + +o.o      |
|E o . o.=+.      |
|.+   ==+ooo.     |
+-----------------+