If you have forgotten the root password for your Linux system, you can reset it by following these steps:
Boot your Linux system into single user mode. You can do this by pressing the appropriate key during the boot process to enter the boot menu, then selecting the option to boot into single user mode.
Once the system has booted into single user mode, you will be presented with a command prompt. At this point, you will be able to enter commands as the root user without being prompted for a password.
Type the following command to remount the root file system in read-write mode:
mount -o remount,rw /
passwd command to reset the root password:passwd
You will be prompted to enter a new password, and then to confirm it.
reboot
After the system reboots, you can log in as the root user using the new password that you just set.
Keep in mind that this process will only work if you have physical access to the system and are able to boot it into single user mode. If you are unable to do this, you may need to use other methods to reset the root password, such as booting from a live CD or USB drive.