单项选择题
A. df
B. lslv
C. filemon
D. fileplace
单项选择题 Whichofthefollowingcommandsshouldbeusedtoshowthepercentageoftimethatanygivendiskwasbusy？（）
单项选择题 Themaxmbuffislowbydefaultforsystemsexpectinghighnetworktrafficand/orusage.Whichofthefollowingutilitiesshouldbeusedtoreportrequestsformbufsthathavefailedand/orbeendenied？（）
单项选择题 WhichofthefollowingcommandsshouldbeusedtodeterminewhichdiskofasystemisexperiencingadiskI/Operformanceproblem？（）