need my usb tethering back

[HLing]

Code:

sudo u-boot-update
sudo nano /boot/extlinux/extlinux.conf

You will find some "labels" with kernel path. Edit the line "default l0" to your choice, eg. "default l1". Save and reboot.

Check running kernel with

Code:

uname -r

Keep in mind if you do a mistake it may not boot. In that case you could boot "jumpdrive" and edit the "extlinux.conf" on a different computer.

Thanks, Quenther.  I don't know what to edit it to.  I don't need to roll back to Kernel 5.9; would just like to have the result of  "uname -a "  be back to:
Linux mobian 5.10-sunxi64 #2 SMP PREEMPT Tues Jan 12 09:55:56 UTC 2021 aarch 64 GNU/Linux.  and not the present one, which is
Linux mobian 5.10-sunxi64 #1 SMP PREEMPT Mon May 31 21:46:30 UTC 2021 aarch 64 GNU/Linux

Is that possible? Otherwise I will be once again getting my Jumpdrive out again...