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=*