Why the answer is A?

weixin_38050048 2003-11-29 03:55:32

Your system has just been brought to the boot prompt through an interrupt . Which command should you now use to minimize the amount of disruption caused to the diskfile system?
A sync
B fsck
C halt
D check
E unmount
F probe-scsi
Answer :A
What is the sync command?why choice A?

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