管道(|)将subshell的所有输出通过管道传输给ssh。

The pipe (|) pipes all output of the subshell to SSH.

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通常它的内容会很多，所以您往往会希望将其通过管道传输到一个阅读器。

It generally puts out a lot of text, so you will generally want to pipe it through a viewer.

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所有与此管道连接的地方，在底部显示这个管道传输的数据流量。

All of the places that the tube connects; and at the bottom, how much data that tube can carry.

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