创建 ssh 信任连接

参考： http://www.powersite.cn/?q=node/62&p=9334c90a88934eac5df7c7710c149d&user=baidu

主要目的是让服务器给客户端建立信任关系，使得以后连接时不需要输入密码

具体步骤是

1.在客户端建立key, 如果没有创建过，用ssh-keygen -t rsa创建一个
2.把生成的id文件（一般是~/.ssh/id_rsa）的内容追加到服务器的~/.ssh/authorized_keys文件中

就是这么简单。

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