Commands to disable MSI webcam:
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1. List what USB devices you have on your PC:
lsusb
and record the IDs of the device (webcam) you want to disable.

2. Navigate to where you can find where USB devices mount:
cd /sys/bus/usb/devices/

3. Find the product id and vendor id through the IDs you got from lsusb (step 1).
These are the ones listed with my MSI 2022 laptop:
grep 2127 */idProduct
grep 5986 */idVendor

4. Just make sure there is only one, if there are two or more options, try to find the specific device and not all devices from same manufacturer.
ls

5. Navigate to the folder of device you want disabled (this is for MSI 2022):
cd 3-8

6. Disable the device temporary with this command.
echo 0 | sudo tee bConfigurationValue

7. Disable the device permanently with this command (replace 3-8 with wanted device):
echo 0 | sudo tee /sys/bus/usb/devices/3-8/bConfigurationValue

8. Can re-enable devices by replacing 0 with 1 for echo (echo overwrites file).

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Source: https://askubuntu.com/questions/166809/how-can-i-disable-my-webcam
Date: February 16th 2022 @ 9:05AM