Examples

     To add a user JSMITH with password SeCrEt to the database, use
     the command

       $ PMDF PASSWORD/USER=JSMITH "SeCrEt"

     The user JSMITH may change his own password, with prompting
     so that the password is not printed on the screen, using the
     command

       $ PMDF PASSWORD
       Password:

     To list all usernames that have an entry in the PMDF password
     database, use the following command:

       $ PMDF PASSWORD/SHOW/USER=*