ubuntu How to Reset Forgotten Root Password in Ubuntu

In this article, you will learn how to reset the forgotten root password on Ubuntu 18.04 LTS and Ubuntu 20.04 LTS.

Firstly, you need to either power on or reboot your Ubuntu system. You should get a grub menu as shown below. If you are running your system on VirtualBox, press the ‘SHIFT’ key on the keyboard to bring up the boot menu.

Ubuntu Grub Menu
Ubuntu Grub Menu

Next, press the 'e' key to edit the grub parameters. This should display a screen as shown below.

Grub Boot Parameters
Grub Boot Parameters

Scroll down until you get to the line that begins with 'linux /boot/vmlinuz' the entire line is highlighted below.

Find Grub Boot Parameter
Find Grub Boot Parameter

Narrow down to a section that reads "ro quiet splash $vt_handoff".

Locate Grub Boot Parameter
Locate Grub Boot Parameter
 

Replace "ro quiet splash $vt_handoff" with rw init=/bin/bash as shown. The aim is to set the root file system with read and write commands denoted by the rw prefix.

Enable Root Filesystem
Enable Root Filesystem

Thereafter, press ctrl + x or F10 to reboot your system. Your system will boot into a root shell screen as shown below. You can confirm that the root filesystem had read and write access rights by running the command.

# mount | grep -w /

The output in the screenshot below confirms read and write access rights denoted by rw.

Confirm Root Filesytem Permissions
Confirm Root Filesytem Permissions

To reset the root password execute the command.

# passwd 

Provide a new password and confirm it. Thereafter, you will get a ‘password updated successfully’ notification.

Reset Root Password in Ubuntu
Reset Root Password in Ubuntu

With the root password successfully changed, reboot into your Ubuntu system by running the command.

# exec /sbin/init

Thank you for coming this far. We hope that you can now comfortably reset the forgotten root password on your Ubuntu system from the grub menu.

0 (0)
Article Rating (No Votes)
Rate this article
Attachments
There are no attachments for this article.
Comments
There are no comments for this article. Be the first to post a comment.
Full Name
Email Address
Security Code Security Code
Related Articles RSS Feed
RHCS6: ’fencing’ basics
Viewed 1178 times since Sun, Jun 3, 2018
Open SSL Creating Certificate Signing Request — CSR Generation
Viewed 890 times since Mon, Feb 18, 2019
A Quick and Practical Reference for tcpdump
Viewed 9608 times since Fri, Jul 27, 2018
RHEL: Extending the maximum inode count on a ext2/ext3/ext4 filesystem
Viewed 1583 times since Sun, May 27, 2018
ZPOOL: Verify/change properties of a zpool
Viewed 994 times since Sun, Jun 3, 2018
Installing and Configuring stunnel on CentOS 6
Viewed 1864 times since Fri, Sep 28, 2018
Creating SWAP partition using FDISK & FALLOCATE commands
Viewed 896 times since Thu, Jan 16, 2020
12 Tcpdump Commands – A Network Sniffer Tool
Viewed 7348 times since Fri, Jul 27, 2018
LVM: Managing snapshots
Viewed 5437 times since Sat, Jun 2, 2018
RHCS6: Basic operations on clustered services
Viewed 1352 times since Sun, Jun 3, 2018