方法一:
linux
使用下例中ssky-keygen和ssh-copy-id,僅需經過3個步驟的簡單設置而無需輸入密碼就能登陸遠程Linux主機。
ssh-keygen 建立公鑰和密鑰。
ssh-copy-id 把本地主機的公鑰複製到遠程主機的authorized_keys文件上。
ssh-copy-id 也會給遠程主機的用戶主目錄(home)和~/.ssh, 和~/.ssh/authorized_keys設置合適的權限 。
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 把公鑰複製到遠程主機上
ligh@local-host$ ssh-copy-id -i ~/.ssh/id_rsa.pub root@192.168.0.3
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 把密鑰追加到遠程主機的 .ssh/authorized_key 上.]
步驟3: 直接登陸遠程主機
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: 你如今已經登陸到了遠程主機上]
ssh
http://blog.163.com/lgh_2002/blog/static/44017526201011333227161/
ide
方法二
加密
1、概述spa
一、就是爲了讓兩個linux機器之間使用ssh不須要用戶名和密碼。採用了數字簽名RSA或者DSA來完成這個操做.net
二、模型分析orm
假設 A (192.168.20.59)爲客戶機器,B(192.168.20.60)爲目標機;
要達到的目的:
A機器ssh登陸B機器無需輸入密碼;
加密方式選 rsa|dsa都可以,默認dsablog
2、具體操做流程rem
單向登錄的操做過程(能知足上邊的目的):
一、登陸A機器
二、ssh-keygen -t [rsa|dsa],將會生成密鑰文件和私鑰文件 id_rsa,id_rsa.pub或id_dsa,id_dsa.pub
三、將 .pub 文件複製到B機器的 .ssh 目錄, 並 cat id_rsa.pub >> ~/.ssh/authorized_keys
四、大功告成,從A機器登陸B機器的目標帳戶,再也不須要密碼了;(直接運行 #ssh 192.168.20.60 )get
http://blog.csdn.NET/kongqz/article/details/6338690