How to reset forgotten root password in centos 7/8

First, reboot or power on your CentOS 8 system. Select the kernel that you want to boot into. Next, press ‘e’ to interrupt the boot process and make changes.

Replace the kernel parameter ro with rw and append an extra kernel parameter init=/sysroot/bin/sh.

Press Ctrl+x combination on the keyboard to enter single-user mode.

Next, run the command below to mount the root file system in read and write mode.

chroot /sysroot

You can now change the root password by executing the command:

passwd

To apply the changes, exit and reboot the CentOS 8 system.

Thankyou.