change the logon account service using command line netbackup

Hello all,

in netbackup i  want to change the logon account service using command line allthough i already know how to change the services manually but it is not helpful for my testing purpose.

Manual procedure is mention below"

To configure the log on account for the NetBackup Client Services

Any one  help me.......any kind of help is appreciated...

Thanks

1. Open the Windows Services application.

2. Double-click on the NetBackup Client Service entry.

3. Click on the Log On tab.

4. If Local System account is not selected as the Log on as account, proceed with step 9.

5. Provide the name of the user account that you created for the NetBackup Client Service.

   The account must include the domain name, followed by the user account, domain_name\account. For example, recovery\netbackup.

6. Type the password.

7. Click OK.

8. Stop and start the NetBackup Client Service.

9. Close the Services control panel application

10. I want to done above mention procedure but using command.

11.