单选题Which of the following can an operator use to shutdown a system into single-user mode?()Ashutdown -dBshutdown -sCshutdown -mDshutdown -Fr -s 1

单选题
Which of the following can an operator use to shutdown a system into single-user mode?()
A

shutdown -d

B

shutdown -s

C

shutdown -m

D

shutdown -Fr -s 1


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