==== WLAN ====

[[https://linuxundich.de/raspberry-pi/drei-wege-das-wlan-auf-einem-raspberry-pi-einzurichten/]]\\

update
  $ sudo apt update
  $ sudo apt full-upgrade
  $ sudo reboot
find the wireless adapter
  $ iwlist scan
  wlan0     No scan results
  lo        Interface doesn't support scanning.
  eth0      Interface doesn't support scanning.
scan for networks
  $ sudo iwlist wlan0 scan | egrep "(ESSID|IEEE)"
    ESSID:"mywireless"
    IE: IEEE 802.11i/WPA2 Version 1
    ESSID:"theothernetwork"
    IE: IEEE 802.11i/WPA2 Version 1
open
  $ sudo nano /etc/wpa_supplicant/wpa_supplicant.conf
change
  network={
    ssid="mywireless"
    psk="password"
  }
restart the wireless adapter
  $ sudo ifdown wlan0
  $ sudo ifup wlan0

----