单项选择题
A.mkgroup -A=john，mary delivery
B.groupadd -A=john，mary delivery
C.mkgroup adms=john，mary delivery
D.groupadd adms=john，mary delivery
单项选择题 Whichcommandshowsdumpcomponentsandcontrolslivedumpattributes？（）
单项选择题 Whichmethodwillconfigureane-mailnotificationwhenpermanenthardwareerrorsareloggedintheerrorlog？（）
单项选择题 Afilesystemfailedtosuccessfullymount，indicatingtheerrormessage：0506-324-cannotmountmedianotformattedorinvalidformat0506-342-SuperblockisdirtyrunfsckWhichparametercanbepassedtothefsckcommandtoautomaticallytakeanyremedialactionrequired？（）