KALI – How to fix ‘ioctl(SIOCSIWMODE) failed: Device or resource busy ‘ problem.
Airmon-ng and airodump-ng may fix to one channel and refuse to return to the default channel hopping mode.
The Problem/Error:
ioctl(SIOSCISWMODE) failed: Device or resource busy
The Solution:
sudo ifconfig wlan2 down
sudo iwconfig wlan2 mode monitor
sudo ifconfig wlan2 up
sudo iwconfig wlan2
Now Check your work:
airodump-ng wlan2
Airodump will now channel hop to find new basestations, rather than being fixed to one channel.
University of South Wales: Cyber University of the year: Four years running: 2019, 2020, 2021, 2022 
my power management still reads: off. Why is that?
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after the 3rd command ifconfig wlan0mon up , i get the same error ioctl(SIOCSIWMODE) failed: Device or resource busy”
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