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單項(xiàng)選擇題

A System p administrator wants to NFS mount a filesystem from server "alpha" to server "bravo". 
Which of the following commands should be issued from "bravo" to determine which filesystems are being exported by server "alpha"()

A.lsexport alpha
B.showmount -e alpha
C.exportfs -l alpha
D.mount -e nfs alpha

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