Raspberry pie uses the command line to configure WiFi connections

1、 Scan around wifi The signal

sudo iwlist wlan0 scan |grep ESSID

2、 The configuration file

sudo nano /etc/wpa_supplicant/wpa_supplicant.conf

The contents of the document

country=CN
ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
update_config=1
network={
    
 ssid="wwwwww"
 psk="wwwwww"
 key_mgmt=WPA-PSK
 priority=1
}

3、 reset network

sudo service networking restart

5、 Check

wpa_cli -i wlan0 reconfigure

ifconfig wlan0

6、 Directly in sd Put the configuration file in the card

（1） file name

wpa_supplicant.conf

（2） The contents of the document

country=CN
ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
update_config=1
network={
    
 ssid="wwwwww"
 psk="wwwwww"
 key_mgmt=WPA-PSK
 priority=1
}