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Unix/Linux

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ddddd<br />

ddddddddddddddddddddddddddddddd<br />

dman commandd<br />

command options arguments<br />

ddd []ddddddddddd|dddddddddddd<br />

$ dddddddddddddddddddrootdd#dddd<br />

$ mail −f newmail<br />

ddddddd<br />

dd dd<br />

-ddddd<br />

$ mail −f newmail $ mail − f newmail<br />

dddddddd<br />

$ mail −f newmail $ mail newmail −f<br />

ddd<br />

$ who −m −u $ who −m−u<br />

$ who −mu $ who −m u<br />

ddd (ddddddd) <strong>Unix</strong>/<strong>Linux</strong>dddddddd 2009d12d 15 / 173

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