Debian 用 wpa_cli 之 romaning mode,不用 network-manager

/etc/wpa_supplicant/wpa_supplicant.conf 加入 network 設定

ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
network={
        ssid="Example"
        psk="password"
        id_str="office"
}

network={
    key_mgmt=NONE
}
# 可以參考 /usr/share/doc/wpasupplicant/examples/wpa-roam.conf

然後在 /etc/network/interfaces 加加 mapping

allow-hotplug wlan0
iface wlan0 inet manual
        wpa-roam /etc/wpa_supplicant/wpa_supplicant.conf

iface office inet dhcp

之後開機就會自動 connect 到合適的 AP 了