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+====== WiFi ======
+To scan all availlable IEEE 802.11 wireless networks:
+<code bash>iwlist <interface> scanning</code>
+To connect the interface with name <interface> with the wireless network with name <wlan_name>:
+<code bash>
+iwconfig <interface> essid <wlan_name>
+</code>
+===== Configure a WiFi interface in monitor mode =====
+<code bash>
+sudo iw wlan0 interface add moni0 type monitor
+sudo ifconfig moni0 up
+</code>
+where //wlan0// is the name of the interface. //moni0// is the name of the interface that receives all the packets of the wireless network. The //wireshark// program can be used through the //moni0// interface to sniff wireless packets.
+Useful link regarding the ''ath10k'' driver: [[https://wireless.wiki.kernel.org/en/users/drivers/ath10k/monitor]]
+===== Some useful options =====
+==== Rate ====
+To block the transmission rate to a given speed use the //bitrates// option of the //iw// command.
+Examples:
+<code bash>
+# Block the rate to 54Mb/s in 5Ghz band
+iw dev wlan0 set bitrates legacy-5 54
+</code>
+===== Configure two WiFi interfaces in Ad-hoc mode =====
+Let //wlan0// and //wlan1// be two WiFi networks interfaces, in the same PC or in different PCs. In order to built an //Ad-hoc// network between these two interfaces,execute the following shell commands:
+<code bash>
+# Put down the network interface
+sudo ifconfig wlan0 down
+# Configure the interface in ad-hoc mode
+sudo iwconfig wlan0 mode ad-hoc
+# Configure the transmission and reception channel (for instance channel 1)
+sudo iwconfig wlan0 channel 48
+# Give a name to the WiFi network (for instance xyz)
+sudo iwconfig wlan0 essid "xyz"
+# Put up the network interface
+sudo ifconfig wlan0 up
+# Eventually provide an address to the network interface (for instance 10.0.0.1 with netmask 255.255.255.0)
+sudo ifconfig wlan0 10.0.0.1 netmask 255.255.255.0
+# Do the same with the second network interface (wlan1)
+sudo ifconfig wlan1 down
+sudo iwconfig wlan1 mode ad-hoc
+sudo iwconfig wlan1 channel 48
+sudo iwconfig wlan1 essid "xyz"
+sudo ifconfig wlan1 up
+sudo ifconfig wlan1 10.0.0.1 netmask 255.255.255.0
+</code>
+===== Connect to a WPA/WPA2 WiFi network =====
+Use the following command to save the passphrase:
+<code bash>
+wpa_passphrase ch1 >> /etc/wpa_supplicant.conf
+mypassphrase
+</code>
+In the command ''ch1'' is the SSID of the Wi-Fi network, while ''mypassphrase'' is the relevant passphrase to connect to the ''ch1'' network.
+The actual connection can be performed with the following command:
+<code bash>
+wpa_supplicant -B -i wlan0 -c /etc/wpa_supplicant.conf
+</code>
+where ''wlan0'' is the name of the interface, while the option ''-B'' runs the ''wpa_supplicant'' utility in background.
+An useful link: http://linuxcommando.blogspot.it/2013/10/how-to-connect-to-wpawpa2-wifi-network.html
+===== Blocked wireless card =====
+In the case the following error is printed into the screen:
+<code bash>
+SIOCSIFFLAGS: Operation not possible due to RF-kill
+</code>
+probably your wireless network card is //soft blocked//.
+Do the following steps:
+  - Check if the network card is //soft blocked//. You can see the command and the possible output:
+<code bash>
+> sudo rfkill list
+: phy0: Wireless LAN
+	Soft blocked: yes
+	Hard blocked: no
+</code>
+  - Unblock all the network cards:
+<code bash>
+sudo rfkill unblock wifi; sudo rfkill unblock all
+</code>
+  - Check again the state of the network card in order to know if it has been unblocked:
+<code bash>
+> sudo rfkill list
+: phy0: Wireless LAN
+	Soft blocked: no
+	Hard blocked: no
+</code>
+===== Disable Network Manager =====
+To disable the Linux //Network Manager// service type the following commands:
+<code bash>
+sudo nmcli radio wifi off
+sudo rfkill unblock all
+</code>
+Other informations on how to disable network manager can be found here: https://support.qacafe.com/knowledge-base/how-do-i-prevent-network-manager-from-controlling-an-interface/

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