Linux/Wifi: Difference between revisions

Latest revision as of 19:09, 12 February 2018

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

@@ Line 25: / Line 25: @@
 <pre>
 ifconfig wlan0 up
+</pre>
+</blockquote>
+* show supported channels
+<blockquote>
+<pre>
+iwlist wlan0 channel
 </pre>
 </blockquote>
@@ Line 31: / Line 38: @@
 <blockquote>
 <pre>
-iwlist wlan0 scan
+iwlist wlan0 scan | grep ESSID
 </pre>
 </blockquote>
+* scan and show channel usage
+<blockquote>
+<pre>
+sudo iwlist wlan0 scan | grep Frequency | sort | uniq -c | sort -n
+</pre>
+</blockquote>
+== configuration ==
+* get country information
+<blockquote>
+<pre>
+iw reg get
+</pre>
+</blockquote>
+* set country information
+<blockquote>
+<pre>
+iw reg set DE
+</pre>
+</blockquote>
+* install WPA support
+<blockquote>
+<pre>
+sudo apt install wpasupplicant
+</pre>
+</blockquote>
+* /etc/wpa_supplicant/wpa_supplicant.conf
+ <blockquote>
+<pre>
+network={
+    ssid="xxxSSIDxxx"
+    psk="xxxPASSWORDxxx"
+}
+</pre>
+</blockquote>
+* bring interface up
+<blockquote>
+<pre>
+ifconfig wlan0 up
+</pre>
+</blockquote>
+* connect to WPA wifi
+<blockquote>
+<pre>
+wpa_supplicant -i wlan0 -c /etc/wpa_supplicant/wpa_supplicant.conf -D wext
+# add -B for background
+</pre>
+</blockquote>
+* get IP
+<blockquote>
+<pre>
+dhclient wlan0
+</pre>
+</blockquote>
+* /etc/network/interfaces
+<blockquote>
+<pre>
+allow-hotplug wlan0
+iface wlan0 inet dhcp
+      wpa-conf /etc/wpa_supplicant/wpa_supplicant.conf
+</pre>
+</blockquote>
+== Troubleshooting ==
+* airplane mode?
+<blockquote>
+<pre>
+rfkill list all
+</pre>
+</blockquote>
 [[Category:Linux/Network]]
 [[Category:Linux]]