ssh-dss 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root@oraclem1
[root@data01 .ssh]#
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看到authorized_keys文件里面有3行记录，分别代表了访问data01（192.168.52.129），oraclem1（192.168.52.131），data02（192.168.52.130）的公用密钥。然后把这个authorized_keys公钥文件copy到oraclem1（192.168.52.131）和data02（192.168.52.130）上面同一个目录下。Scp命令如下：
scp authorized_keys192.168.52.130:/root/.ssh/
scp authorized_keys192.168.52.131:/root/.ssh/
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5.5 开始check验证如下：
[root@oraclem1 ~]# ssh 192.168.52.130
Last login: Tue Apr 7 02:40:40 2015 from data01
[root@data02 ~]# ssh 192.168.52.131
Last login: Tue Apr 7 02:40:56 2015 from 192.168.52.131
[root@oraclem1 ~]# ssh 192.168.52.130
Last login: Tue Apr 7 02:41:11 2015 from 192.168.52.131
[root@data02 ~]# ssh 192.168.52.129
Last login: Tue Apr 7 02:40:01 2015 from 192.168.52.131
[root@data01 ~]# ssh 192.168.52.131
Last login: Tue Apr 7 02:41:18 2015 from 192.168.52.130
[root@oraclem1 ~]# ssh 192.168.52.129
Last login: Tue Apr 7 02:41:26 2015 from data02
[root@data01 ~]# ssh 192.168.52.131
Last login: Tue Apr 7 02:41:31 2015 from 192.168.52.129
[root@oraclem1 ~]# ssh 192.168.52.130
Last login: Tue Apr 7 02:41:21 2015 from 192.168.52.131
[root@data02 ~]# ssh 192.168.52.129
Last login: Tue Apr 7 02:41:42 2015 from 192.168.52.131
[root@data01 ~]
OK，3台服务器已经能实现两两互相ssh通了，不需要输入密码即可。
PS：如果不能实现任何两台主机互相之间可以无密码登录，后面的环节可能会有问题。
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5.6 实现主机名hostname登录
在3台服务器上，编辑/etc/hosts,追加入以下内容保存退出
192.168.52.129 data01
192.168.52.130 data02
192.168.52.131 oraclem1
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验证主机名登录：
[root@data02 ~]# ssh oraclem1
The authenticity of host 'oraclem1(192.168.52.131)' can't be established.
RSA key fingerprint ise5:f0:ae:e3:14:35:2f:09:1f:88:dd:31:c3:1a:e1:73.
Are you sure you want to continueconnecting (yes/no)? yes
Warning: Permanently added 'oraclem1' (RSA)to the list of known hosts.
Last login: Tue Apr 7 02:51:59 2015 from data01
[root@oraclem1 ~]# ssh data02
Last login: Tue Apr 7 02:52:10 2015 from data01
[root@data02 ~]# ssh oraclem1
Last login: Tue Apr 7 02:52:18 2015 from data02
[root@oraclem1 ~]# vim /etc/hosts
[root@oraclem1 ~]# ssh data01
Last login: Tue Apr 7 02:52:06 2015 from data02
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