Reset root password

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Revision as of 10:56, 17 October 2009 by Graysky (Talk | contribs) (Method 2 - Using GRUB's Boot Menu)

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Introduction

Below are several methods one can use to reset the system's root password should it be forgotten or corrupted.

Method 1 - Using the Arch Live CD

1. Boot the Arch Live CD and mount your root partition to /mnt.

2. Bind mount the /dev, /sys, and /proc special mount points into your /mnt:

# mount --bind /dev /mnt/dev
# mount --bind /sys /mnt/sys
# mount --bind /proc /mnt/proc

3. chroot into your installation:

# chroot /mnt /bin/bash

4. Use the passwd command to reset your root password. 5. Reboot and don't lose your password again!

Method 2 - Using GRUB's Boot Menu

1. Select the appropriate entry in the GRUB menu and press Template:Keypress to edit the line.

2. Select the kernel ... line and press Template:Keypress again to edit it.

3. Append init=/bin/bash at the end of line.

4. Press Template:Keypress to boot (don't worry, this change is only temporary and will not be saved to your menu.lst). Once you boot you should be at a (#) prompt.

5. Your root file system should be mounted as readonly so remount it as read/write:

# mount -n -o remount,rw /

6. Use the passwd command to reset your root password.

7. Reboot and don't lose your password again!