sudo iwconfig
sudo airmon-ng start wlan0
sudo aireplay-ng --test wlan0mon
kali@kali:~$ sudo aireplay-ng --test wlan0mon
09:29:45 Trying broadcast probe requests...
09:29:47 No Answer...
09:29:47 Found 2 APs
09:29:47 Trying directed probe requests...
09:29:47 F0:5C:19:7E:9E:84 - channel: 11 - 'KHIPU-GUEST-TEMP'
09:29:48 Ping (min/avg/max): 0.936ms/7.238ms/33.950ms Power: -60.96
09:29:48 28/30: 93%
09:29:48 Injection is working!
09:29:48 9C:8C:D8:19:BB:24 - channel: 11 - 'KHIPU-GUEST-TEMP'
09:29:48 Ping (min/avg/max): 1.627ms/4.396ms/10.954ms Power: -55.27
09:29:48 30/30: 100%