Linux/Wifi

Get infos

• list network hardware

lshw -class network

• show all network devices

ifconfig -a

• get wifi information

iwconfig

• bring interface up

ifconfig wlan0 up

• show supported channels

iwlist wlan0 channel

• scan for wifi networks

iwlist wlan0 scan | grep ESSID

• scan and show channel usage

sudo iwlist wlan0 scan | grep Frequency | sort | uniq -c | sort -n

configuration

• get country information

iw reg get

• set country information

iw reg set DE

• install WPA support

sudo apt install wpasupplicant

• /etc/wpa_supplicant/wpa_supplicant.conf

network={
    ssid="xxxSSIDxxx"
    psk="xxxPASSWORDxxx"
}

• bring interface up

ifconfig wlan0 up

• connect to WPA wifi

wpa_supplicant -i wlan0 -c /etc/wpa_supplicant/wpa_supplicant.conf -D wext
# add -B for background

• get IP

dhclient wlan0

• /etc/network/interfaces

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

Troubleshooting

• airplane mode?

rfkill list all