Forgot user/password of S9xx tv box with armbian

[Thais Brollo]

I installed ambian in this tv box to run klipper for my 3d printer, but its been a years since I last used it and I totally forgot what was the user I created. I really didn't want to wipe the SD card because of my 3d printer's config files etc. Is there anything I can do to retrieve the user and password? Thanks.

[Michael Robinson]

First thing backup all the configs with another linux computer. Then you can try to chroot the sd card on the other linux computer and run passwd as root.