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发表于 2007-1-15 19:52:37
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显示全部楼层
这个是man文档的一部分,看看就明白了
Runlevel reads the system utmp file (typically /var/run/utmp) to
locate the runlevel record, and then prints the previous and current
system runlevel on its standard output, separated by a single space.
If there is no previous system runlevel, the letter N will be printed
instead. |
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