单选题A system administrator is unable to unmount a file system. Which is the appropriate command to determine who or what is accessing the file system?()Awho /filesystemBlsfs /filesystemCfuser /filesystemDumount -f /filesystem

单选题
A system administrator is unable to unmount a file system. Which is the appropriate command to determine who or what is accessing the file system?()
A

who /filesystem

B

lsfs /filesystem

C

fuser /filesystem

D

umount -f /filesystem


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