Commands

airmon-ng check kill
airmon-ng start wlan0

airmon-ng stop wlan0

sudo ip link set wlan0 down
sudo iwconfig wlan0 mode monitor
sudo ip link set wlan0 up

Verify:

sudo iw dev wlan0mon info
sudo iwconfig wlan0mon  #deprecated

sudo aireplay-ng -9 -e wifu -a <BSSID> wlan0mon

Card2Card:

sudo aireplay-ng -9 -i wlan1mon wlan0mon

sudo ip link set wlan1 down
sudo iwconfig wlan1 channel 12
sudo ip link set wlan1 up
iwlist wlan1 channel

https://stackoverflow.com/questions/29560308/how-to-force-wifi-adapter-to-use-specific-channel
look for your interface
```
sudo iwconfig
```
look at your channels
```
sudo iwlist {interface} channel
```
turn off wifi
```
sudo iwconfig {interface} power off
```

set your desired channel

sudo iwconfig {interface} channel {channel, ex. "23"}

set your desired frequency

sudo iwconfig {interface} freq {frequency, ex. "5.00G"}