单项选择题
A./etc/conf B./etc/lilo.conf C./proc/kcore D./usr/local/
A.cp myfile /dev/null B.touch myfile C.create myfile D.mkfile myfile
A.bashB.ashC.cshD.gnush
A.restart--delay=0 B.reboot-w C.halt-p D.shutdown-rnow
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