There are different options for resetting the superuser password.
Changing the user password can be done when a user is logging in to the management GUI for the first time. The user is required to change from the default password. When logged in as a superuser to the management GUI, the password can be changed by hovering over superuser on the upper right of the page, and then clicking the Modify Password link. The user is logged out and is required to reenter the new password.
The password can also be changed by using the CLI. The password can be reset to its default value by using the CLI after the password-reset feature is enabled. The USB flash drive interface also supports resetting the password. You can also access the service assistant from the technician port to change the password.