Hi everybody,
The issue was solved with information found in others posts:
FORGOTTEN ROOT PASSWORD FOR OS4000 SUSE LINUX
If you've forgotten Linux host root password, but you know the Assistant engr password you can ssh to Assistant and change the Linux host root password with:
sshr passwd
Required software
Secure Shell (SSH) client – this is a piece of software that is working over secure shell network protocol. Used port for log-in is 22. For more details about SSH please visit:
Basic Steps to Reset Administrator Password
1. Start SSH client and then enter credentials for Assistant: IP assistant, user: engr / password.
2. Once you logged on the system with user engr, please type this command: sshr passwd
Assistant-linux:/home/engr # sshr passwd
3. Enter the new password
After entering the above command you will get an output similar to:
Changing password for root.
Password changed.
That indicates that ROOT password was successfully reset. In case you see different type of messages at this step please re-read the steps above carefully.