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單項(xiàng)選擇題

Which command can be used to verify that filesystems are being exported by a server？（）

A.showmount -e ServerName
B.vi /etc/exports
C.startsrc -g nfs
D.exportfs -i FileSystemName

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單項(xiàng)選擇題

A gateway machine has access to the Internet and is trying to reach a machine on the Internet called cactus.org. Although the gateway machine cannot reach cactus.org， another network across town is able to reach cactus.org. Furthermore， the gateway machine can reach the network across town， but cannot ping the cactus.org. Which of the following tools will best help diagnose the location of the problem？（）

A.iptrace
B.netstat
C.tcpdump
D.traceroute

單項(xiàng)選擇題

Which of the following local files is used to run the date command on the remote machine "Earth" using the following rexec command without request for a password？ rexec Earth date（）。

A.~/ .rhosts
B.$HOME/.netrc
C./etc/hosts.equiv
D./etc/security/user