Accidentally changed the root=/dev/mmcblk0p1 to root=/dev/sda1 on the extlinux.conf file on a Jetson Nano SUB version board and now I am stuck on a page which shows bash-4.4# when I boot the board, bash-4.4# ls, #bin dev etc init lib mnt proc root sbin sys tmp usr var , everytime that I boot the board. How can I try to change back the extlinux.conf file to add the root back to root=/dev/mmcblk0p1? I found this file after I went to cd /boot/extlinux/ and sudo cp extlinux.conf extlinux.conf.boot_emmc_backup then entered the vim extlinux.conf to modify it but now when I boot the system at bash-4.4# the command cd /boot/extlinux/ does not exists and I do not know how to get back to the previous boot loading screen.
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