ssh

SSH公钥免密登录

ssh连接使用公钥免密登录

1. 制作公钥

ed25519方式

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[root@VM-4-12-centos ~]# ssh-keygen -t ed25519 -C "HongKong@uuxia.cn"
Generating public/private ed25519 key pair.
Enter file in which to save the key (/root/.ssh/id_ed25519): 
/root/.ssh/id_ed25519 already exists.
Overwrite (y/n)? y
Enter passphrase (empty for no passphrase): 
Enter same passphrase again: 
Your identification has been saved in /root/.ssh/id_ed25519.
Your public key has been saved in /root/.ssh/id_ed25519.pub.
The key fingerprint is:
SHA256:WOaLsCD+PTOpbs3DvEdlA/k4lepSQ/uXklT5Cv4sb/E HongKong@uuxia.cn
The key's randomart image is:
+--[ED25519 256]--+
|        . . .    |
|       + o o     |
|      . X . .    |
|       % B   .   |
|. . . + S + o    |
|.. . + + * =     |
| .  * = . = o    |
|  ...@ . . + E   |
|  o+.oB   +.     |
+----[SHA256]-----+

rsa方式

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ssh-keygen -t rsa -C "HongKong@uuxia.cn"

2. 安装公钥

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[root@VM-4-12-centos ~]# cat ~/.ssh/id_ed25519.pub > ~/.ssh/authorized_keys
[root@VM-4-12-centos ~]# chmod 600 ~/.ssh/authorized_keys 
[root@VM-4-12-centos ~]# chmod 700 ~/.ssh/

3. 修改SSH配置

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sudo nano /etc/ssh/sshd_config


PubkeyAuthentication yes

禁用ssh密码登录,可以不禁用
PasswordAuthentication no

sudo service sshd restart

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-----BEGIN OPENSSH PRIVATE KEY-----
b3BlbnNzaC1rZXktdjEAAAAABG5vbmUAAAAEbm9uZQAAAAAAAAABAAAAMwAAAAtzc2gtZW
QyNTUxOQAAACBFXprOqGFkUMg3AJAlTEQQVCVbt+BTxDB1C5A+JMXQsgAAAJiA8NffgPDX
3wAAAAtzc2gtZWQyNTUxOQAAACBFXprOqGFkUMg3AJAlTEQQVCVbt+BTxDB1C5A+JMXQsg
AAAECeFUhNhKurVgYkIXYKhwZ4Y09bXs8Sln0WlTtY7+JYdUVems6oYWRQyDcAkCVMRBBU
JVu34FPEMHULkD4kxdCyAAAAD2hldHBpNEB1dXhpYS5jbgECAwQFBg==
-----END OPENSSH PRIVATE KEY-----

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-----BEGIN OPENSSH PRIVATE KEY-----
b3BlbnNzaC1rZXktdjEAAAAABG5vbmUAAAAEbm9uZQAAAAAAAAABAAAAMwAAAAtzc2gtZW
QyNTUxOQAAACBi+wXwnH9fh0lebu9JzDG2hBoWEjueIGbnt+hvjnat3AAAAJi4l4PmuJeD
5gAAAAtzc2gtZWQyNTUxOQAAACBi+wXwnH9fh0lebu9JzDG2hBoWEjueIGbnt+hvjnat3A
AAAEBCPjafbpoYxx0iWNFSL0A3CHtSgmmDV/+Y46SAclqv9GL7BfCcf1+HSV5u70nMMbaE
GhYSO54gZue36G+Odq3cAAAAEWhvbWVwaTRzQHV1eGlhLmNuAQIDBA==
-----END OPENSSH PRIVATE KEY-----
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-----BEGIN OPENSSH PRIVATE KEY-----
b3BlbnNzaC1rZXktdjEAAAAABG5vbmUAAAAEbm9uZQAAAAAAAAABAAAAMwAAAAtzc2gtZW
QyNTUxOQAAACA8+LMAD9OzOFpu48I7k/J8PFQSPUxAl0V3O7yK0me2tAAAAJiG5lCFhuZQ
hQAAAAtzc2gtZWQyNTUxOQAAACA8+LMAD9OzOFpu48I7k/J8PFQSPUxAl0V3O7yK0me2tA
AAAEAADBNvYO8owdd0Nd1Jj1h5zB8SjP8LWex7fBVnwMgA1Tz4swAP07M4Wm7jwjuT8nw8
VBI9TECXRXc7vIrSZ7a0AAAAEHRlbmNlbnRAdXV4aWEuY24BAgMEBQ==
-----END OPENSSH PRIVATE KEY-----
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-----BEGIN OPENSSH PRIVATE KEY-----
b3BlbnNzaC1rZXktdjEAAAAABG5vbmUAAAAEbm9uZQAAAAAAAAABAAAAMwAAAAtzc2gtZW
QyNTUxOQAAACBYr18zgN38cTW9Mohlyui72GjQbVwuHCfcMGlyiWqJQwAAAJhTAryrUwK8
qwAAAAtzc2gtZWQyNTUxOQAAACBYr18zgN38cTW9Mohlyui72GjQbVwuHCfcMGlyiWqJQw
AAAEDDLLNd7gQEYDoWS5d9iCWL5nV/93X8aAB0JX73PJKwblivXzOA3fxxNb0yiGXK6LvY
aNBtXC4cJ9wwaXKJaolDAAAAEUhvbmdLb25nQHV1eGlhLmNuAQIDBA==
-----END OPENSSH PRIVATE KEY-----

id_ed25519_hetpi4s

id_ed25519_homepi4s

uuxia.cn

HongKong

光猫登陆：
192.168.3.1
root/adminHW

宽带账户:202107592177，密码:096016