Embedded device, Linux version, U-Boot 2009.03 bootloader. ARM Linux Kernel Image on NAND flash, loading from NAND.

How to access the filesystem as the root user, and to reset the root password? Is it possible to get this by supplying single boot argument (single-user mode) to Linux kernel via U-boot parameters? Or by adding init=/bin/bash argument to the end of the boot parameters. The output of bootargs and bootcmd environment variables:

Kernel command line: console=ttyS1,115200n8 rootfstype=squashfs noalign half_image=0 verify=y Hw_Model=RZU017 Router_Mode=0
  • @roaima: after the Kernel is fully loaded, then it issues the console login prompt. (login:)
    – Lexx Luxx
    Nov 22, 2017 at 20:03
  • There are clearly noted that pass is not known.
    – Lexx Luxx
    Nov 23, 2017 at 7:08
  • If it was clear I wouldn't have had to ask what you meant.
    – roaima
    Nov 23, 2017 at 7:58

1 Answer 1


The correct command for this board is:

setenv bootargs ${bootargs} single init=/bin/sh

(there is no bash installed)

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