您第一次连接到主机时，系统会询问您是否需要将远程主机公钥的副本保存在“已知主机”文件中(请参见清单5)。

The first time you connect to a host, the system asks if you want to keep a copy of the remote hosts public key in your 'known hosts' file (see Listing 5).

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SSH的主要优点之一是，通过将您的公钥复制到一台远程计算机，您可以绕过正常的登录和密码交换。

One of the main benefits of SSH is that you can bypass the normal login and password exchange by copying your public key to a remote machine.

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请记住，如果您尚未与这台远程主机交换您的公钥，那么清单1中的序列需要您输入一个密码。

Bear in mind that the sequence in Listing 1 requires you to enter a password if you haven't already exchanged your public key with the remote host.

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