Linux 创建信任机制

在node1上

[root@node1 backup]# cd ~/.ssh

[root@node1 .ssh]# ssh-keygen -t rsa

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:

40:93:30:6f:60:06:9b:d0:50:97:3d:47:01:a8:f8:cc root@node1

The key’s randomart image is:

+–[ RSA 2048]—-+

|o+o.B=++o. |

| ..*o=+.. |

| .o. +o |

|. . . . |

| + S |

| E |

| |

| |

| |

+—————–+

这里执行ssh-keygen -t rss 这个命令后会出现一些命令让输入指令 这里直接敲回车就可以了。

会生成两个文件 id_rsa id_rsa.pub

[root@node1 .ssh]# ls

id_rsa id_rsa.pub known_hosts

然后将id_rsa.pub导入到其他节点服务器上相应的目录下

[root@node1 .ssh]# scp id_rsa.pub 192.168.1.102:/root/.ssh

root@192.168.1.103’s password:

id_rsa.pub 100% 392 0.4KB/s 00:00

然后去102服务器相应目录下

[root@node2 .ssh]# cat id_rsa.pub>authorized_keys 注意这个文件名一定不能错

然后在node1节点连接node2

[root@node1 .ssh]# ssh 192.168.1.102

Last login: Fri Oct 9 00:39:19 2015 from 192.168.1.100

连接成功

[root@node3 ~]# exit