Password Recovery - Password Recovery - 2025.2 English - UG1144

Use the following steps to recover password:

1. Set "launch_ramdisk_init" U-Boot environment variable in uEnv.txt file

   launch_ramdisk_init=1

2. Add the file into fat partition of sd/emmc/usb boot devices
   Note: Instead of previous variable, you can also set this bootargs setenv bootargs 'ext4=/dev/null:/rootfs init_fatal_sh=1 '; in uEnv.txt or from U-Boot prompt before kernel handoff.
3. U-Boot reads the file and boot with tiny rootfs
4. On tiny rootfs, mount rootfs partition to directory

   mount /dev/mmcblk0p2 /mnt/

5. Change the root directory for the current running process to the specified directory

   chroot /mnt

6. Change the password

   passwd petalinux

7. Sync and unmount partition

   sync
   exit
   umount /dev/mmcblk0p2

8. Reset the board and try to login using updated password