debian11安装配置ssh服务

No LSB modules are available.
Distributor ID: Debian
Description:    Debian GNU/Linux 11 (bullseye)
Release:        11
Codename:       bullseye

sudo apt install -y openssh-server

如果不需要配置秘钥，此时就已经可以通过ssh登录到服务器了，密码方式登录

首先登录到想要使用秘钥登录的账户，键入命令ssh-keygen

ssh-keygen

Generating public/private rsa key pair.
Enter file in which to save the key (/home/test/.ssh/id_rsa):  #秘钥保存路径
Created directory '/home/test/.ssh'.
Enter passphrase (empty for no passphrase):    #秘钥的通行码，如果私钥泄露，但对方不知道秘钥通行码仍无法登录服务器
Enter same passphrase again:     #再次输入秘钥通行码
Your identification has been saved in /home/test/.ssh/id_rsa    #私钥
Your public key has been saved in /home/whoami/.ssh/id_rsa.pub  #公钥
The key fingerprint is:
SHA256:/25cz9LeAYZUhwv4AyqoMxb18/xDJ6zDruA7FLi4SSA test@debian

如果没有修改秘钥保存路径，默认会在用户的家目录下创建一个.ssh文件夹，私钥和秘钥就保存在.ssh中

cd .ssh
cat id_rsa.pub >> authorized_keys

将私钥保存在客户端，服务器端保存公钥就可以了。之后就可以使用私钥登录到服务器了。