【www.bbyears.com--linux】
以下步骤在 CentOS 5/6/7、RHEL 5/6/7 和 Oracle Linux 6/7 上测试通过。
节点1：192.168.0.9 节点2 : 192.168.l.10
步骤一 :
测试节点1到节点2的连接和访问：
[root@node1 ~]# ssh root@192.168.0.10
The authenticity of host "192.168.0.10 (192.168.0.10)" can"t be established.
RSA key fingerprint is 6d:8f:63:9b:3b:63:e1:72:b3:06:a4:e4:f4:37:21:42.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added "192.168.0.10" (RSA) to the list of known hosts.
root@192.168.0.10"s password:
Last login: Thu Dec 10 22:04:55 2015 from 192.168.0.1
[root@node2 ~]#
步骤二：
使用 ssh-key-gen 命令生成公钥和私钥，这里要注意的是可以对私钥进行加密保护以增强安全性。
[root@node1 ~]# ssh-keygen
Generating public/private rsa key pair.
Enter file in which to save the key (/root/.ssh/id_rsa):
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /root/.ssh/id_rsa.
Your public key has been saved in /root/.ssh/id_rsa.pub.
The key fingerprint is:
b4:51:7e:1e:52:61:cd:fb:b2:98:4b:ad:a1:8b:31:6d root@node1.ehowstuff.local
The key"s randomart image is:
+--[ RSA 2048]----+
| . ++ |
| o o o |
| o o o . |
| . o + .. |
| S . . |
| . .. .|
| o E oo.o |
| = ooo. |
| . o.o. |
+-----------------+
步骤三：
用 ssh-copy-id 命令将公钥复制或上传到远程主机，并将身份标识文件追加到节点2的 ~/.ssh/authorized_keys 中：
[root@node1 ~]# ssh-copy-id -i ~/.ssh/id_rsa.pub 192.168.0.10
root@192.168.0.10"s password:
Now try logging into the machine, with "ssh "192.168.0.10"", and check in:
.ssh/authorized_keys
to make sure we haven"t added extra keys that you weren"t expecting.
步骤四：
验证免密码 SSH 登录节点2：
[root@node1 ~]# ssh root@192.168.0.10
Last login: Sun Dec 13 14:03:20 2015 from www.ehowstuff.local
有没有发现配置ssh免密码登录是非常的简单的呀，好了到此关于CentOS/RHEL上设置SSH免密码登录就介绍完了，希望对各位有帮助．