List available network interface

lsnet.sh

#!/usr/bin/sh

for iface in $(ls /sys/class/net/); do 
    echo "Interface: $iface"; 
    mode=$(iw $iface info 2>/dev/null)
    if [[ $? -eq 0 ]]; then
    mode=$(echo "$mode" | grep type | awk '{print $2}')
    echo "Mode: $mode"
    fi
    ethtool -i $iface 2>/dev/null | grep -E 'driver|version'; 
    pci=$(ethtool -i $iface 2>/dev/null | grep bus-info | awk '{print $2}' | cut -d: -f2,3); 
    if [[ -n "$pci" ]]; then
	lspci -v -s $pci | grep -E 'Ethernet|Network'
    else
	echo "PCI info not found"; 
    fi
    echo "-----"; 
done

iw list also a good command

with that command, you can see if your network card are support AP or not, support VIF or not

watch -n .1 cat /proc/net/wireless cool command

Nice Wiki page, talking about Wi-Fi technology and its standard

use iwconfig command to see more related to Wi-Fi

Nice Wiki page, talking about VIF (Virtual Interface) or VNI (Virtual Network Interface)

category: Computer Networks

TIL the existence of Promiscuous mode

Previously, I just knew two modes of interface mode: monitor and managed.

EDIT: it seems monitor mode and promiscuous mode are similar? while on monitor mode, promiscuous mode was mentioned by dmesg command

Software access point

Many wireless devices even support simultaneous operation both as AP and as wireless "client" at the same time. Using that capability you can create a software AP acting as a "wireless repeater" for an existing network, using a single wireless device.

Wut?

deactivate first?:

ip link set dev wlan0mon down

rename the interface:

ip link set dev wlan0mon name wlan0

switch interface mode:

iwconfig wlan0 mode managed

re-activate?

ip link set dev wlan0 up