树莓派3-B-ubuntu18042-设置-wifi

首先按照网上的教程，给 microSD 卡 format，然后把 ubuntu 镜像拷上去。
开机，初始化系统
然后连一根网线

然后：

For the image with apt installed

Step1:

sudo apt-get install wireless-tools

Step2:

sudo apt-get install wpasupplicant

Step3: add to /etc/network/interfaces:

auto wlan0 
iface wlan0 inet dhcp
wpa-ssid WIRELESSSSID 
wpa-psk WIRELESSPASSWORD

Step4: comment from /etc/network/interfaces the line:

#source /etc/network/interfaces.d/*.cfg

the commented interfaces.d/*.cfg file contains settings for the eth0.

I do not understand why but leaving this line active and adding the wlan0 config would crash the system at boot.

Step5: reboot

For the core image without apt installed:

Step1:

ifconfig wlan0 down
ifconfig wlan0 up

Step2: create wireless config file:

sudo vi /etc/network/interfaces.d/wlan0

Note: I tried without sudo but it would not let me save the changes

Step3: add the following content

auto wlan0 
iface wlan0 inet dhcp
wpa-ssid WIRELESSSSID 
wpa-psk WIRELESSPASSWORD

Step4: reboot

其实都不需要 reboot，只要重启网卡即可：

sudo systemctl restart networking
sudo ifdown wlan0
sudo ifup wlan0
wpa_cli status

参考：
https://askubuntu.com/questio…