ssh密鑰登入

方法一:

使用下例中ssky-keygen和ssh-copy-id，僅需通過3個步驟的簡單設定而無需輸入密碼就能登入遠端Linux主機。

ssh-keygen 建立公鑰和密鑰。

ssh-copy-id 把本地主機的公鑰複制到遠端主機的authorized_keys檔案上。

ssh-copy-id 也會給遠端主機的使用者主目錄（home）和~/.ssh, 和~/.ssh/authorized_keys設定合适的權限 。

步驟1: 用 ssh-key-gen 在本地主機上建立公鑰和密鑰

ligh@local-host$ ssh-keygen -t  rsa

Enter file in which to save the key (/home/jsmith/.ssh/id_rsa):[Enter key]

Enter passphrase (empty for no passphrase): [Press enter key]

Enter same passphrase again: [Pess enter key]

Your identification has been saved in /home/jsmith/.ssh/id_rsa.

Your public key has been saved in /home/jsmith/.ssh/id_rsa.pub.

The key fingerprint is: 33:b3:fe:af:95:95:18:11:31:d5:de:96:2f:f2:35:f9

ligh@local-host

步驟2: 用 ssh-copy-id 把公鑰複制到遠端主機上

ligh@local-host$ ssh-copy-id -i ~/.ssh/id_rsa.pub  [email protected]

ligh@remote-host‘s password:

Now try logging into the machine, with ―ssh ?remote-host‘‖, and check in:

.ssh/authorized_keys to make sure we haven‘t added extra keys that you weren‘t expecting.

[注: ssh-copy-id 把密鑰追加到遠端主機的 .ssh/authorized_key 上.]

步驟3: 直接登入遠端主機

ligh@local-host$ ssh remote-host

Last login: Sun Nov 16 17:22:33 2008 from 192.168.1.2

[注: SSH 不會詢問密碼.]

ligh@remote-host$

[注: 你現在已經登入到了遠端主機上]

http://blog.163.com/lgh_2002/blog/static/44017526201011333227161/

方法二

一、概述

1、就是為了讓兩個linux機器之間使用ssh不需要使用者名和密碼。采用了數字簽名RSA或者DSA來完成這個操作

2、模型分析

假設 A （192.168.20.59）為客戶機器，B（192.168.20.60）為目标機；

要達到的目的：

A機器ssh登入B機器無需輸入密碼；

加密方式選 rsa|dsa均可以，預設dsa

二、具體操作流程