That's something you could test with an Ubuntu Live-USB stick or Live-CD/DVD. While the live session is running, plug-in the USB cable that is attached to your phone (which should be set to USB-tethering) into the computer and then open a terminal and type in this command:
You should see some kind of reaction, e.g. your system telling you that it can see a new network device on the USB port.
When I do that here with my Samsung Galaxy phone (set to USB tethering) and an Ubuntu 20.04 installation I get this:
Code:
[ 2408.360953] usb 2-1: new high-speed USB device number 5 using ehci-pci
[ 2408.524369] usb 2-1: New USB device found, idVendor=04e8, idProduct=6860, bcdDevice= c.00
[ 2408.524377] usb 2-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 2408.524382] usb 2-1: Product: SAMSUNG_Android
[ 2408.524387] usb 2-1: Manufacturer: SAMSUNG
[ 2408.524392] usb 2-1: SerialNumber: xxxxxxxxxxx
[ 2411.285817] usb 2-1: USB disconnect, device number 5
[ 2411.809001] usb 2-1: new high-speed USB device number 6 using ehci-pci
[ 2411.967593] usb 2-1: New USB device found, idVendor=04e8, idProduct=6863, bcdDevice= c.00
[ 2411.967602] usb 2-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 2411.967607] usb 2-1: Product: SAMSUNG_Android
[ 2411.967612] usb 2-1: Manufacturer: SAMSUNG
[ 2411.967616] usb 2-1: SerialNumber: xxxxxxxxxxxxx
[ 2412.033043] usbcore: registered new interface driver cdc_ether
[ 2412.038880] rndis_host 2-1:1.0 usb0: register 'rndis_host' at usb-0000:00:1d.7-1, RNDIS device, xx:xx:xx:xx:xx:xx
[ 2412.045373] usbcore: registered new interface driver rndis_host
In that very moment my desktop's top panel also showed a new "Ethernet" network icon. So there definitely was a reaction and it worked.
So that's something you should definitely be able to test in a Live session too.
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