scp登录The authenticity of host 192.168.0.xxx can't be established.　的问题

scp 1.txt root@192.168.1.25:/tmp
The authenticity of host '192.168.1.25 (192.168.1.25)' can't be established.
RSA key fingerprint is 6c:28:23:df:45:d5:c8:79:4d:9e:ed:f6:f2:73:22:4c.
Are you sure you want to continue connecting (yes/no)?

提示输入yes后，屏幕不断出现y，只有按ctrl + c结束

错误是：The authenticity of host 192.168.1.xxx can't be established.

执行ssh -o StrictHostKeyChecking=no 192.168.1.xxx　就OK

然后

在一，在linux100主机里的用户
运行
#ssh-keygen -t rsa

结果如下

QUOTE:
Generating public/private rsa key pair.
Enter file in which to save the key (/home/.username/ssh/id_rsa):#回车
Enter passphrase (empty for no passphrase):#回车
Enter same passphrase again:#回车
Your identification has been saved in /home/.username /.ssh/id_rsa.
Your public key has been saved in /home/.username /.ssh/id_rsa.pub.
The key fingerprint is:
38:25:c1:4d:5d:d3:89:bb:46:67:bf:52:af:c3:17:0c username@localhost
Generating RSA keys:
Key generation complete.

会在用户目录~/.ssh/产生两个文件，id_rsa，id_rsa.pub
二，把linux100主机上的id_rsa.pub文件拷贝到linux200主机的root用户主目录下的.ssh目录下,并且改名为authorized_keys
即：
/root/.ssh/authorized_keys

如果已经有authorized_keys这个文件，将id_rsa.pub的内容拷贝到 authorized_keys文件中。cat id_rsa.pub >> authorized_keys 便可以。

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