How can I create a text file from an Oracle trigger?

I need to urgently create an Oracle trigger that will write a text file every time a table is updated. The Oracle databse is a Unix box, but I need to access the text-file from a Windows box.
I know SQL but I have never written a trigger before.
Please help...many thanks
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does the oracle box have a connection to the unix box?

I would have the data saved into a oracle table.

then from there send it to the other box.
here is a sample of a trigger

    CREATE OR REPLACE TRIGGER orders_after_update
        ON orders
        FOR EACH ROW

        v_username varchar2(10);


        -- Find username of person performing UPDATE into table
        SELECT user INTO v_username
        FROM dual;

        -- Insert record into audit table
        INSERT INTO orders_audit
         ( order_id,
           username )
         ( :new.order_id,
           v_username );


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eddieconAuthor Commented:
Good idea, thanks!
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