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Written by Oleksandr Gavenko (AKA gavenkoa), compiled on 2017-01-30 from rev ccaa2f364422+.

WiFi under linux.

Getting info about WiFi connection.

$ /sbin/iwconfig
$ sudo iwlist wlan0 scanning
http://wiki.debian.org/iwconfig
Debian wiki.
http://en.wikipedia.org/wiki/Wireless_tools_for_Linux
Wireless tools for Linux.
https://wiki.archlinux.org/index.php/Wireless_network_configuration
WiFi at Arch wiki.

List of devices.

$ iw dev
$ rfkill list all
$ ip link show

Rfkill caveat.

$ rfkill list
$ rfkill unblock wifi

Enable Wifi in recovery mode.

ifconfig wlan0 up
iwlist wlan0 scan
iwconfig wlan0 essid $NETWORK key s:$PASS