After 1 month holiday I forgot the admin or root passwords to get in to Ubuntu Mate on Raspberry Pi 2. It still automatically logs me in and I can access the terminal, but commands such as passwd require me to know the password in the first place. Is there a way to reset the user or root password? I know it’s possible in GRUB but unfortunately it’s not the case on Pi. Any help appreciated? Or is it a reinstall?
Thanks