远程Linux ssh 免密登录（本机为Windows）

生成密钥

官网下载Git bash
开启Git Bash

ssh-keygen -t rsa

一路回车

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:ZNXVC6euyG3arpEvckXz8j1zNDM2FDJmdXifq4bdl84 root@vm1
The key's randomart image is:
+---[RSA 2048]----+
|          .. .o+.|
|         .  .*.o+|
|        o   o *.=|
|       o   o . +.|
|        S . + . .|
|          .o o B.|
|        .o+ * =.*|
|       . =+= =.*o|
|        oo*+. .E=|
+----[SHA256]-----+

拷贝密钥

 cat ~/.ssh/id_rsa.pub

把显示的内容拷贝出来粘贴到远程Linux上的

~/.ssh/authorized_keys

文件末尾
或者

cat ~/.ssh/id_rsa.pub | ssh root@vm 'cat >> .ssh/authorized_keys'

测试

$ ssh root@vm
Welcome to Ubuntu 22.04.1 LTS (GNU/Linux 5.15.0-53-generic x86_64)

 * Documentation:  https://help.ubuntu.com
 * Management:     https://landscape.canonical.com
 * Support:        https://ubuntu.com/advantage

19 updates can be applied immediately.
3 of these updates are standard security updates.
To see these additional updates run: apt list --upgradable

Last login: Thu Dec  1 17:39:20 2022 from 192.168.50.170