[maemo-users] Permissions on /etc/sudoers messed up - reflash?

From: Matan Ziv-Av matan at svgalib.org
Date: Sat Jan 22 01:49:14 EET 2011
On Sat, 22 Jan 2011, Philipp Haselwarter wrote:

> I chmod 0640'ed /etc/sudoers on my N900 and closed the terminal -.-
> sudo gainroot/chmod/... fails complaining about the permissions, the gui
> package manager does so silently.
> Can't mount the filesystem root offline on another device to chmod 0440
> back (?), can't login as root locally, ssh to localhost seems to work but I
> don't have the slightest idea about the root password.
> Any way to avoid a reflash?

You can boot another system. For example Meego:

1. Download any u-boot image (for example the one from here:
    http://al.robotfuzz.com/~al/maemo/u-boot/u-boot.bin ) and flash it
    (as a kernel):

flasher-3.5 -f -k u-boot.bin

2. Prepare a uSD card for meego according to instructions here:

3. Boot into meego, mount the N900 root filesystem (ubifs on mtd5), and
    fix the problem

4. Reflash kernel by downloading the firmware image and using the

flasher-3.5 -f -F RX-51_2009SE_20.2010.36-2_PR_COMBINED_MR0_ARM.bin --flash-only=kernel

Matan Ziv-Av.                         matan at svgalib.org

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