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步骤1: 用 ssh-key-gen 在本地主机上创建公钥和密钥 ligh@local-host$ ssh-keygen -t rsa Enter file in which to save the key (/home/jsmith/.ssh/id_rsa):[Enter key] Enter passphrase (empty for no passphrase): [Press enter key] Enter same passphrase again: [Pess enter key] Your identification has been saved in /home/jsmith/.ssh/id_rsa. Your public key has been saved in /home/jsmith/.ssh/id_rsa.pub. The key fingerprint is: 33:b3:fe:af:95:95:18:11:31:d5:de:96:2f:f2:35:f9 ligh@local-host
步骤2: 用 ssh-copy-id 把公钥复制到远程主机上 ligh@local-host$ ssh-copy-id -i ~/.ssh/id_rsa.pub root@192.168.0.3 ligh@remote-host‘s password: Now try logging into the machine, with ―ssh ?remote-host‘‖, and check in: .ssh/authorized_keys to make sure we haven‘t added extra keys that you weren‘t expecting. [注: ssh-copy-id 把密钥追加到远程主机的 .ssh/authorized_key 上.]
步骤3: 直接登录远程主机 ligh@local-host$ ssh remote-host Last login: Sun Nov 16 17:22:33 2008 from 192.168.1.2 [注: SSH 不会询问密码.] ligh@remote-host$
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原文地址：http://my.oschina.net/u/2242064/blog/417897
