创建秘钥
[root@ubuntu tmp]$ 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:
公共秘钥
id_rsa.pub
私钥
id_rsassh 公共秘钥
原文：http://www.cnblogs.com/listenerln/p/7832950.html
