Specifies the username, password, and optional connect string of the user performing the export. If you omit the password, then Export will prompt you for it.
If you connect as user
SYS, then you must also specify
AS SYSDBA in the connect string. Your operating system may require you to treat
AS SYSDBA as a special string, in which case the entire string would be enclosed in quotation marks.
The user's guide for your Oracle Net protocol for information about specifying a connect string for Oracle Net