This BRTOOLS command option defines the user name and password for RMAN to connect to the database.
Input syntax: -u [<user>[/<password>]]
Default value: system/<default_password>
If you only enter -u , an interactive query of the user name and the password is performed by the SAP tool. You can enter the user name and the password separately (only enter the user name or the option -u <user>). The tool then prompts entry of the password. In this case, the password is not displayed during entry and does not appear in the process list.
These measures are taken to protect the DBA password.