单项选择题 WhatisthelaststepinsettingupaPrimaryDomainNameServer？（）
单项选择题 Whenrunonamachinecalledclient，whichofthefollowingcommandswillmountthe/usr/local/bindirectoryfromthehostoverthe/home/bindirectoryonclient？（）
单项选择题 Whichofthefollowingfilesshouldbeeditedtodisableremotemachinesfromperforminga"finger"onasystem？（）