WB6 root password recovery

uboot autoboot stop

Entering commands

The procedure for recovering the root password on the Wiren Board 6 controller

1. Connect to the debug port of the Wiren Board 6 controller (via microUSB-connector Debug Console). The connection is described in detail on the Debug UART page.
2. Turn on the power of the controller (the controller indicator lights green continuously) and when a message "Hit any key to stop autoboot:" appears with the selected countdown in the UART console, then press any key.
3. In response to the command line prompt => sequentially enter the command:
   setenv optargs ro rootwait fixrtc single init=/bin/sh
run bootcmd
   If you do not enter commands, watchdog restarts the controller.
4. After downloading (the indicator of the controller lights up red continuously), we obtain a system prompt #
5. Mount the root filesystem
   mount -n -o remount,rw /dev/mmcblk0p2 /
   and we get the message EXT4-fs (mmcblk0p2): re-mounted. Opts: (null)
6. Mount the partition from the configuration backup:
   mount /dev/mmcblk0p6 /mnt/data
   and we get the message EXT4-fs (mmcblk0p6): mounted filesystem with ordered data mode. Opts: (null)
7. Enter passwd and change password. Successful password change: passwd: password updated successfully
8. Copy the new password to the section from the configuration backup:
   cp /etc/shadow /mnt/data/etc
9. Unmount both file systems:
   # sync
# umount /mnt/data
# umount /
10. Turn off and turn on the power again. The password is changed.