★ SSH 密钥身份验证

SSH 密钥身份验证

一、环境要求

准备
1、Linux客户机（Desktop） 2、Linux服务器（Server）

思路
1、在Desktop客户机生成密钥（密钥：一个公钥，一个私钥） 2、把公钥传到服务器端/root/.ssh/authorized_keys 3、验证结果

一、在Desktop客户机上生成SSH密钥。

[root@desktop ~]# ssh-keygen
Generating public/private rsa key pair.
Enter file in which to save the key (/root/.ssh/id_rsa): //回车
Enter passphrase (empty for no passphrase): //回车
Enter same passphrase again: //回车
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:
fd:ed:7f:50:f3:46:63:97:54:e1:2b:14:aa:ef:a5:01 root@desktop
The key's randomart image is:
+--[ RSA 2048]----+
| . .+|
| . o. |
| . ....|
| .. . ==|
| SE. ..+=|
| o. .o o|
| o...o |
| . +. .|
| o ..o|
+-----------------+
[root@desktop ~]#

二、在Desktop客户机上把公钥上传到Server服务器上。

[root@desktop ~]# ssh-copy-id root@server
The authenticity of host 'server0 (172.25.0.11)' can't be established.
ECDSA key fingerprint is eb:24:0e:07:96:26:b1:04:c2:37:0c:78:2d:bc:b0:08.
Are you sure you want to continue connecting (yes/no)? yes
/usr/bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installed
/usr/bin/ssh-copy-id: INFO: 1 key(s) remain to be installed -- if you are prompted now it is to install the new keys
root@server's password: //输入服务器root密码

Number of key(s) added: 1

Now try logging into the machine, with: "ssh 'root@server'"
and check to make sure that only the key(s) you wanted were added.

[root@desktop ~]#

验证：
通过Desktop直接SSH登录到Server上