Linux、Unix双机创建信任

一、  分别在服务端（192.168.147.132）和客户端（192.168.147.133），进入.ssh目录
    下面以服务端（192.168.147.132）为例：
    cd ~/.ssh

二、  执行生成密钥命令
    命令行 [ssh-keygen -t rsa]
    [root@bogon /]# 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:
    53:7d:f0:f4:6d:42:77:59:b5:8a:d7:76:3e:18:fe:82 root@bogon
    The key's randomart image is:
    +--[ RSA 2048]----+
    |            . o O|
    |           . = ++|
    |          . . +.+|
    |         .  ..oo |
    |        S  . + o.|
    |         .  o +..|
    |            .o ..|
    |           E .. .|
    |              .. |
    +-----------------+
    [root@bogon /]# ls /root/.ssh/
    id_rsa  id_rsa.pub
    
三、 将以上服务端公私密钥 id_rsa.pub 复制到 客户端并保存为authorized_keys的地址：

     /root/.ssh/authorized_keys 
    scp /root/.ssh/id_rsa.pub 192.168.147.133:/root/.ssh/authorized_keys 
    
四、 查看客户端文件是否复制成功，复制成功后直接在服务端直接登陆
    [ssh 192.168.147.133]
    [root@bogon .ssh]# ssh 192.168.147.133
    Last login: Tue Apr  3 10:54:45 2018 from 192.168.147.132
    显示登陆成功！