The -t option displays a total line, and the -s option along with a value refreshes the info with the frequency specified.
t选项显示整个行，带一个值的-s选项以指定的频率刷新信息。
The -t option displays a total line, and the -s option along with a value refreshes the info with the frequency specified.
t选项显示整个行，带一个值的-s选项以指定的频率刷新信息。
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