Reset the lost or forgotten root password in vCenter Server Appliance 6.5 & 6.7

How to reset the lost or forgotten root password in vCenter Server Appliance 6.5 & 6.7 (2147144)

This article provides steps to reset the root password if you have lost or forgotten the existing root password for a vCenter Server Appliance 6.5 / 6.7

Process to Reset the Root Password in VCSA:
To reset the lost forgotten root password in vCenter Server Appliance follow the steps below:

Take a snapshot or backup of the vCenter Server Appliance before proceeding. Do not skip this step.
Reboot the vCenter Server Appliance
After the VCSA Photon OS starts, press e key to enter the GNU GRUB Edit Menu.
Locate the line that begins with the word Linux.
Append these entries to the end of the line:

rw init=/bin/bash

Press F10 to continue booting.
Run the mount -o remount,rw / command.
In the Command prompt, enter the command passwd and provide a new root password (twice for confirmation):

passwd

Unmount the filesystem by running this command:

umount /

Reboot the vCenter Server Appliance by running this command:

reboot -f

Confirm that you can access the vCenter Server Appliance using the new root password.
Remove the snapshot taken in Step 1 if applicable.

https://kb.vmware.com/s/article/2147144

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