04 Raspberry Pi USB wifi アダプタ設定

1. sudo lsusb でアダプタを認識しているかチェック
Bus 001 Device 002: ID 1a40:0101 Terminus Technology Inc. 4-Port HUB
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 003: ID 0b95:772b ASIX Electronics Corp.
Bus 001 Device 004: ID 0411:01a2 BUFFALO INC. (formerly MelCo., Inc.) WLI-UC-GNM Wireless LAN Adapter [Ralink RT8070]

2. sudo vi /etc/network/interfaces　に以下を追加

allow-hotplug wlan0
iface wlan0 inet dhcp
wpa-conf /etc/wpa_supplicant/wpa_supplicant.conf
iface default inet dhcp

3. sudo vi /etc/wpa_supplicant/wpa_supplicant.conf

ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
update_config=1
network={
ssid=”SSID”
proto=WPA2
key_mgmt=WPA-PSK
psk=”PASSWORD”
}

4. NICの再起動
sudo ifdown wlan0
sudo ifup wlan0

5. sudo ifconfig で確認

6. sudo iwconfig でもチェック

7．ルーティングチェック
sudo netstat -nrt