单项选择题
Which of the following commands should be used to check whether a system dump is valid and readable?（）
A. kdb B. snap -d C. dbx -vmcore D. od /dev/sysdumpdev
单项选择题 Ifasystemadministratorwantstoshowonlyadiskreportfordisk2,attwosecondintervals,whatisthecorrectcommandtorun?（）
单项选择题 Whichiostat%iowaitminimumthresholdindicatesapossibleI/Obottleneck?（）
单项选择题 Whichcommandrecordsthepathtakenbynetworkpacketsbetweenasourceanddestinationsystem?（）
