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In this answer this answer, at the very bottom, Gilles mentions that a command can have more than one output or input.

Yes, there's cat foo bar | something, for having both foo and bar as inputs, and there's tee for outputs; but this doesn't really seem to be what he's talking about.

How can a program have more than one input or output?

In this answer, at the very bottom, Gilles mentions that a command can have more than one output or input.

Yes, there's cat foo bar | something, for having both foo and bar as inputs, and there's tee for outputs; but this doesn't really seem to be what he's talking about.

How can a program have more than one input or output?

In this answer, at the very bottom, Gilles mentions that a command can have more than one output or input.

Yes, there's cat foo bar | something, for having both foo and bar as inputs, and there's tee for outputs; but this doesn't really seem to be what he's talking about.

How can a program have more than one input or output?

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strugee

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How can a command have more than one output?

In this answer, at the very bottom, Gilles mentions that a command can have more than one output or input.

Yes, there's cat foo bar | something, for having both foo and bar as inputs, and there's tee for outputs; but this doesn't really seem to be what he's talking about.

How can a program have more than one input or output?

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How can a command have more than one output?