How to Reset Forgotten Root Password in RHEL/CentOS and Fedora

In this post will guide you simple steps to reset forgotten root password in RHEL, CentOS and Fedora Linux with example. There are various ways to reset root password which are.

  1. Booting into single user mode.
  2. Using boot disk and edit passwd file.
  3. Mount drive to another system and change passwd file.
Reset Root Password
Reset Forgotten Root Password

Here, in this article we are going to review “Booting into single user mode” option to reset forgotten root password.

Cautious: We urge to take backup of your data and try it out at your own risk.

STEP 1. Boot Computer and Interrupt while booting at GRUB stage hitting ‘arrow‘ keys or “space bar“.

Booting Grub Stage
Booting GRUB Stage

STEP 2. Type ‘a‘ to modify kernel argument. Anytime you can cancel typing ‘ESC‘ key.

Modifying Kernel Parameters
Modify Kernel Argument

STEP 3. Append 1 at the end of “rhgb quiet” and press “Enter” key to boot into single user mode.

Append 1 at the GRUB
Append 1 at the Screen

STEP 4. Type command “runlevel” to know the the runlevel where you are standing. Here “1 S” state that your are in a single user mode.

Command runlevel
Type Command runlevel

STEP 5. Type ‘passwd‘ command without username and press ‘Enter‘ key in command prompt. It’ll ask to supply new root password and re-type the same password for confirmation. “Your are Done” Congratulation!!!

Passwd Command
Type passwd Command

What if GRUB bootloader is password protected? We’ll cover in our next article, how to protect GRUB with password and reset the same. Stay tuned…

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63 thoughts on “How to Reset Forgotten Root Password in RHEL/CentOS and Fedora”

  1. Hi All, I am new to Linux. I tried to break my root password with above method. but when i interupt the grub, and type a, nothing comes up. After sometime it just loads the default OS version, but when i give e instead of a, and use different sets of commands, I am able to change the root password. Can some one tell what am i missing in the above method. I am using centos 7 in my VM.

    Reply
    • @Ravi,

      Which version of Linux distribution are you using? mostly it wouldn’t ask for password in maintenance mode, either you doing wrong, follow the instructions carefully..

      Reply

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