第一步增加username 的sudo权限

以root用户登录debian系统

apt install sudo

sudo apt install vim

cd /etc/

vim sudoers

找到root ALL=(ALL:ALL) ALL在下面一行添加一行

username ALL=(ALL:ALL) ALL

按esc 英文状态下输入:wq

保存退出文件

替换原版的apt源至清华大学源

sudo apt install apt-transport-https ca-certificate

接下来

cd /etc/apt

sudo cp source.list source.list.bak

sudo vim source.list

输入:%d清空文件内容

输入：set mouse=c

按i 进入编辑模式

将以下内容粘贴进文件中

# 默认注释了源码镜像以提高 apt update 速度，如有需要可自行取消注释

deb https://mirrors.tuna.tsinghua.edu/debian/ buster main contrib non-free

# deb-src https://mirrors.tuna.tsinghua.edu/debian/ buster main contrib non-free

deb https://mirrors.tuna.tsinghua.edu/debian/ buster-updates main contrib non-free

# deb-src https://mirrors.tuna.tsinghua.edu/debian/ buster-updates main contrib non-free

deb https://mirrors.tuna.tsinghua.edu/debian/ buster-backports main contrib non-free

# deb-src https://mirrors.tuna.tsinghua.edu/debian/ buster-backports main contrib non-free

deb https://mirrors.tuna.tsinghua.edu/debian-security buster/updates main contrib non-free

# deb-src https://mirrors.tuna.tsinghua.edu/debian-security buster/updates main contrib non-free

然后：wq保存退出

sudo apt update

安装realtek驱动

sudo apt install firmware-realtek

sudo apt install wireless-tools

sudo apt install iw

sudo apt install wpasupplicent

cd /etc/network

sudo cp interface interface.bak

ip addr

记下无线网卡的名称：wls32

sudo vim /etc/network/interface

编辑 /etc/network/interface 文件，添加以下内容

#The wireless network interface

allow-hotplug wls32

iface wls32 inet dhcpwpa-conf /etc/wpa_supplicant/wpa_supplicant.conf

保存退出

chmod 0600 /etc/network/interfaces

su -l -c "wpa_passphrase your_ssid your_password > /etc/wpa_supplicant/wpa_supplicant.conf"

或者编辑 /etc/wpa_supplicant/wpa_supplicant.conf文件，添加以下内容

country=CN

ctrl_interface=DIR=/var/run/wap_supplicant GROUP=netdevupdate_config=1network={

ssid="your_ssid"

psk="your_password"}

sudo ifup wls32