免密登录

• Z时代
• 2024-01-10
• 分类：综合

A登录B

A

1. ssh-keygen

root@ubuntu:~# ssh-keygen
Generating public/private rsa key pair.
Enter file in which to save the key (/root/.ssh/id_rsa): 
Enter passphrase (empty for no passphrase): 
Enter same passphrase again: 
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:
SHA256:EXnWo89OEFM1glhqMiN8U/uGYk6zGLMapIYjbacqijI root@ubuntu
The key"s randomart image is:
+---[RSA 2048]----+
|        o+.+o.o  |
|   .   .o+* o. . |
|    o * =o + .   |
|     o * +o      |
|  . o = S o+     |
|.+   O + .  +    |
|=.+ + o    o     |
|Eo =        .    |
|Boo              |
+----[SHA256]-----+

2. 获取公钥信息

root@ubuntu:~# cat ~/.ssh/id_rsa.pub 
ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQC0jAAcd/+8Nu/K/lH9ZLybafwnxgCeTVzTt5nfSHrr/hUmj+Rk7249NoYdT5wuZTHFYZS0ItIp1rNym/wOml2cS5NbTBs1N78RlZf29GS2ufZewHFFLP698m0X8uNfgPnSJfNGJXgMc1uGmcRQ7z3Wp8nymrOVosr9oUHlZk5XljtXpaZbWJ7GpaYnzZVaMTGgBtBubdZk72LBNp6qBTYePJGjCAAK5PDtYUJjKmiO2rtsI6g8rKdmtb6PW/u6yPoVdGyMQh+cdMV2vNtW3+xfmjaO+EMqbS9K3sBRjleqmQGORPzoFTHYxDyFisw/o+5zdlApg+3F8Eru7sSoDQKP root@ubuntu

B

1.写入A的公钥

vim ~/.ssh/authorized_keys
# 写入A的公钥信息
ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQC0jAAcd/+8Nu/K/lH9ZLybafwnxgCeTVzTt5nfSHrr/hUmj+Rk7249NoYdT5wuZTHFYZS0ItIp1rNym/wOml2cS5NbTBs1N78RlZf29GS2ufZewHFFLP698m0X8uNfgPnSJfNGJXgMc1uGmcRQ7z3Wp8nymrOVosr9oUHlZk5XljtXpaZbWJ7GpaYnzZVaMTGgBtBubdZk72LBNp6qBTYePJGjCAAK5PDtYUJjKmiO2rtsI6g8rKdmtb6PW/u6yPoVdGyMQh+cdMV2vNtW3+xfmjaO+EMqbS9K3sBRjleqmQGORPzoFTHYxDyFisw/o+5zdlApg+3F8Eru7sSoDQKP root@ubuntu

A

测试

root@ubuntu:~# ssh 10.241.4.3

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