Case #1
The admin password was changed and you don’t remember it, but root password is still the default.
Log in as root via NodeGrid console port, type its default password root. At the shell prompt, type passwd admin and enter the new password. You should be able to log in as admin with the new password.
Case #2
The root password was changed, but admin has still the default password.
Log in as admin via ssh, telnet, or console. At the admin cli prompt, type: shell sudo su -
It should present the root shell prompt. Then type passwd root and enter the new password. You should be able to log in as root with the new password.
Case #3
Both admin and root passwords were changed and you don’t remember them.
Follow the steps below: