不一定适用于所有环境，前提是先卸载 network-manager-applet 和 NetworkManager，这两个搞不定的就不要看了

/etc/wpa_supplicant/wpa_supplicant.conf:
network={
  ssid="6F"
scan_ssid=1
  key_mgmt=WPA-PSK
psk="88888888.."
}

/usr/bin/wpa_supplicant -iwlp1s0 -c/etc/wpa_supplicant/wpa_supplicant.conf
/usr/sbin/dhcpcd wlp1s0
echo "nameserver 114.114.114.114" > /etc/resolv.conf
# how to view ip address => ip addr