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https://edonymu.com/2017/10/14/shell%e8%87%aa%e5%8a%a8%e4%ba%a4%e4%ba%92%e7%9a%84%e4%b8%89%e7%a7%8d%e6%96%b9%e6%b3%95/
Shell自动交互的三种方法