Ubuntu 下 SSH 实现远程登录 无需输入密码

首先准备两台linux OS 的机子,这里用的是虚拟机

第一台:

chiwei@chiwei-VirtualBox:~$ hostname
chiwei-VirtualBox

IP:192.168.8.144

第二台:

chiwei@chiwei-hadoop:~/.ssh$ hostname
chiwei-hadoop

IP:192.168.8.200


分别在两台机子上安装openssh-server     http://blog.csdn.net/simonchi/article/details/38871953    这里有说明


安装完成之后就可以使用SSH命令了

在第一台执行  ssh-keygen -t rsa   

chiwei@chiwei-VirtualBox:~$ ssh-keygen -t rsa
Generating public/private rsa key pair.
Enter file in which to save the key (/home/chiwei/.ssh/id_rsa): 
Enter passphrase (empty for no passphrase): 
Enter same passphrase again: 
Your identification has been saved in /home/chiwei/.ssh/id_rsa.
Your public key has been saved in /home/chiwei/.ssh/id_rsa.pub.
The key fingerprint is:
1d:45:b5:a3:54:6e:a7:f6:65:79:27:9b:a6:1c:d4:d2 chiwei@chiwei-VirtualBox
The key's randomart image is:
+--[ RSA 2048]----+
|           .o.o  |
|           . o . |
|          . . = .|
|         . o = +.|
|        S . + E.=|
|           . o *+|
|            . + .|
|           . +   |
|            o    |
+-----------------+

执行   cp id_rsa.pub authorized_keys

执行

chiwei@chiwei-VirtualBox:~/.ssh$ scp authorized_keys chiwei@chiwei-hadoop:/home/chiwei/.ssh
chiwei@chiwei-hadoop's password: 
authorized_keys                                                                                                                                                            100%  406     0.4KB/s   00:00    
chiwei@chiwei-VirtualBox:~/.ssh$ ssh chiwei-hadoop
Welcome to Ubuntu 14.04 LTS (GNU/Linux 3.13.0-24-generic x86_64)


 * Documentation:  https://help.ubuntu.com/


359 packages can be updated.
6 updates are security updates.

到第二台机子去查看

chiwei@chiwei-hadoop:~/.ssh$ ls
authorized_keys  id_rsa  id_rsa.pub
chiwei@chiwei-hadoop:~/.ssh$ 

已经文件传过来了

现在在第一台机子直接ssh   第二台主机  就可以直接登录了



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