1）在A机上生成钥匙对,执行以下命令： ssh-keygen -t rsa Generating public/private rsa key pair. Enter file in which to save the key (/root/.ssh/id_rsa): /root/.ssh/id_rsa Enter passphrase (empty for no passphrase):直接回车 Enter same passphrase again:直接回车 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: f6:61:a8:27:35:cf:4c:6d:13:22:70:cf:4c:c8:a0:23 root@host1 这样，在/root/.ssh/路径下会生成id_rsa，和id_rsa.pub，其中id_rsa是密钥，id_rsa.pub是公钥www.linuxidc.com。
