[Gnuplot-info] How to disable gnuplot startup message?

[Youjun H. <yj...@gm...>]

Hi, all
 I'm using gnuplot interactively.   Everytime I type `gnuplot` in the
terminal, a message such as follows  appears

    G N U P L O T
    Version 4.2 patchlevel 3
    last modified Mar 2008
    System: Linux 2.6.25.4

    Copyright (C) 1986 - 1993, 1998, 2004, 2007, 2008
    Thomas Williams, Colin Kelley and many others


After seeing this message many times, I think I remember it well and want to
disable this startup message.
How to disable this startup message?
Thank you for your help!