单项选择题
A system administrator wants to NFS mount a filesystem from server "Alpha" to server "Bravo." Which command should be issued from "Bravo" to determine which filesystems are being exported by server "Alpha"？ （）
A.lsnfsmnt Alpha B.exportfs -l Alpha C.showmount -e Alpha D.mount -t nfs Alpha
单项选择题 WhichcommandwillshowthenetworkconfigurationsettingsassociatedwithanEthernetadapter？（）
单项选择题 Whichofthefollowingcommandswillsettheduplexofanetworkadapter？（）
单项选择题 Wherearetimekeepingservicesconfigured？（）
