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7.1 管道概念管道类似于文件重定向，可以将前一个命令的stdout重定向到下一个命令的stdin。要点管道命令仅处理stdout，会忽略stderr。管道右边的命令必须能接受stdin。多个管道命令可以串联。与文件重定向的区别文件重定向左边为命令，右边为文件。管道左右两边均为命令，左边有stdou...

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