1. 网卡配置

#编辑网卡
sudo nano /etc/network/interfaces

#网卡配置【静态】
allow-hotplug ens32
iface ens32 inet static
        address 10.1.1.4/28
        gateway 10.1.1.2
        # dns-* options are implemented by the resolvconf package, if installed
        dns-nameservers 10.1.1.2

#配置DNS
nano /etc/resolv.conf
nameserver 10.1.1.2

#查看网卡
ip addr

#关闭网卡【ifdown 网卡名称】
sudo ifdown ens32

#开启网卡【ifup 网卡名称】
sudo ifup ens32

2. SSH配置

#编辑ssh文件
sudo nano /etc/ssh/sshd_config

打开22端口【默认是关闭的，将“#”去掉就是打开，可自行修改端口】

这条是决定能否通过远程使用root用户登录
将这条修改成：“permitRootLogin yes”就是打开【不推荐】

#重启ssh服务
sudo service ssh restart

3. 源库配置

#编辑源库
sudo nano /etc/apt/sources.list

#更换源，将系统默认的源关闭，如：
# deb http://deb.debian.org/debian/ bullseye-updates main contrib

#然后添加稳定版国内源
# Security updates
deb https://mirrors.ustc.edu.cn/debian-security/ bullseye-security main contrib non-free
deb-src https://mirrors.ustc.edu.cn/debian-security/ bullseye-security main contrib non-free

# Stable updates
deb https://mirrors.ustc.edu.cn/debian bullseye-updates main contrib non-free
deb-src https://mirrors.ustc.edu.cn/debian bullseye-updates main contrib non-free

# Base repository
deb https://mirrors.ustc.edu.cn/debian bullseye main contrib non-free
deb-src https://mirrors.ustc.edu.cn/debian bullseye main contrib non-free

# Stable backports
deb https://mirrors.ustc.edu.cn/debian bullseye-backports main contrib non-free
deb-src https://mirrors.ustc.edu.cn/debian bullseye-backports main contrib non-free

在官方有说明：
https://www.debian.org/doc/manuals/debian-handbook/apt.zh-cn.html#sect.apt-sources.list.stable

更新软件包

sudo apt update		#读取源库

sudo apt upgrade	#更新软件包