Root password

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Reset root password in Linux

There are a number of different ways to do root password recovery on a Linux system. Different distributions make it easier than others. You must be physically in front of the system.

Boot from your first install CD and as the very first screen comes up hit F2 and type: rescue and the computer will boot in rescue mode.

Select “mount the existing partitions” and go to the shell/console prompt.

Boot from the first install CD ( or any Live CD like Knoppix ) and at the boot prompt type: linux single It will boot in “single user mode” and you will get an odd looking prompt like “sh-2.09#” Alternative, With the most Live and Rescue CDs you can also just boot in the live version, mount the partition and, as root, make changes to the files indicated below:

  1. cd /etc

To reset password, as root user, we need to change two files; “passwd” and “shadow”

  1. nano passwd

find root:x:0:0:root:/root:/bin/bash

Nano-passwd.png

Change it to: root::0:0:root:/root:/bin/bash

Nano-passwd1.png

Save and exit the file.

Now open the shadow file

  1. nano shadow

The first line is a long line of characters

Nano-shadow.png

Change it to: root:::: ( four colons ! )

Nano-shadow1.png

Now you can reboot your computer. Log in as normal user, open a console and as the root user type: $ su

  1. passwd

New password: Retype new password:

Change-passwd.png

Now, you can log in as a root user with the new password.

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