记录黑客技术中优秀的内容, 传播黑客文化,分享黑客技术精华

使用ssh-keygen设置ssh无密码登录

2013-04-15 14:35

也知道这个东西,大家都会,就当是谁忘了的时候,做个提醒的吧。。。
ssh 是一个专为远程登录会话和其他网络服务提供安全性的协议。默认状态下ssh链接是需要密码认证的,可以通过添加系统认证(即公钥-私钥)的修改,修改后系统间切换可以避免密码输入和ssh认证。以下将创建过程简单介绍下。

一、用ssh-keygen创建公钥
haifeng@haifeng-EX38-DS4:/$ ssh-keygen -t rsa
Generating public/private rsa key pair.
Enter file in which to save the key (/home/haifeng/.ssh/id_rsa):
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /home/haifeng/.ssh/id_rsa.
Your public key has been saved in /home/haifeng/.ssh/id_rsa.pub.
The key fingerprint is:
7b:75:98:eb:fd:13:ce:0f:c4:cf:2c:65:cc:73:70:53 haifeng@haifeng-EX38-DS4
The key’s randomart image is:
+–[ RSA 2048]—-+
| E|
| .|
| …|
| + =.|
| S + +.*|
| . . + Bo|
| . . . = =|
| . . . * |
| . ..=|
+—————–+

##输入后,会提示创建.ssh/id_rsa、id_rsa.pub的文件,其中第一个为密钥,第二个为公钥。过程中会要求输入密码,为了ssh访问过程无须密码,可以直接回车 。
2.查看钥匙。
[root@localhost .ssh]# ls ~/.ssh/
id_rsa id_rsa.pub known_hosts

###可以发现 ssh目录下的两枚钥匙。
3.将公钥复制到被管理机器上面
[root@localhost .ssh]# scp id_rsa.pub root@192.168.36.194:~/.ssh/authorized_keys
root@192.168.36.194′s password:
id_rsa.pub 100% 408 0.4KB/s 00:00
4.访问
# ssh 192.168.36.194
The authenticity of host ‘ (<192.168.36.194>)’ can’t be established.
RSA key fingerprint is 34:b9:92:06:53:e6:91:4d:47:92:73:57:78:6a:5d:09.
Are you sure you want to continue connecting (yes/no)?yes
Warning: Permanently added ‘ (<192.168.36.194>‘ (RSA) to the list of known hosts.

这是因为首次访问后,ssh会在.ssh/known_hosts中保存各个认证过的主机信息:
192.168.36.194 ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAQEAppStzIRxeFn0e737z7KO1tdm6CJUoLapaaoBDZqHy0Z11cUAmpg02dbrqwU7TBY9lDFwWQcry+W8X8qk1CoPdzu8YcMCpw5425mai0/RxkB/RPZ1putL2DQrRBMRTU1m5meLOYRXYlnU5E+YElCgH+ZJ8EXiurOzDvw6vi7pASi9wMQuJosFyNmv5E9/8ULgaKg3LtvP+0O1wPxrHOBDwVq2u9Oi7T2pX8deBEnOI4uG4CGXn/p0ml+uuS4DO3Up2VjqoRtqtuzWExnTyAGS/wQNnN3mera1ERya3FomEVHJRV5K2zJRkgSF8WfETXzQ2rAliOsW/YLTGF8vVvjo5w==
5.再次访问,ssh登录发现可以不用密码登录。
[root@localhost .ssh]# ssh 192.168.36.194
Last login: Fri Apr 22 00:56:45 2011 from 192.168.18.44
[root@Game2 ~]#

知识来源: itsafe.org/?p=848

阅读:69316 | 评论:0 | 标签:Linux ssh ubuntu

想收藏或者和大家分享这篇好文章→复制链接地址

“使用ssh-keygen设置ssh无密码登录”共有0条留言

发表评论

姓名:

邮箱:

网址:

验证码:

公告

关注公众号hackdig,学习最新黑客技术

推广

工具

标签云