ssh每次输入密码是不是很烦？ 请使用ssh 认证！原文地址： Beginning SSH on Ubuntu
总体思路： 在本机(ssh 客户端)利用 ssh-keygen 产生一个密钥和公钥， 再把公钥放到远程服务器（ssh server）即可。
因此
1 （客户端）ssh-keygen -t dsa
2 （远程服务器） cat (客户端产生的公钥)id_dsa.pub >> authorized_keys , 此步骤可以用ssh-copy-id命令简化
ssh-copy-id -i ~/.ssh/id_dsa.pub root@192.168.0.4 (替换为你服务器的用户名密码)原理和具体做法在上述原文中都有详细介绍。
作者：yaozer 原文链接：使用ubuntu ssh认证，不用密码即可登录ssh server
欢迎转载, 非常感谢你能注明作者和原始出处。
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