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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…