单项选择题
A.tar
B.tctl
C.rmdev
D.backup
单项选择题 Therootvgdiskonasystemfailedandwasreplaced.Thesystemwasrestoredusingthelatestmksysb.However，nofilesinthe/homefilesystemwererestored.Whatisthelikelycauseofthisproblem？（）
单项选择题 Asystemwithoutamonitorhascrashed.Theadministratorwouldliketoseetheconsoleoutputtodetermineapossiblecauseofthecrashandensurethattherewerenoproblemsonreboot.Whichcommandwouldbeused？（）
单项选择题 AfteraddinganewEthernetcardtoasystemandrebooting，thesystemadministratornoticesthecardwasnotconfigured.Howcanthesystemadministratordetermineiftherewereerrorsduringtheconfigurationprocessforthecard？（）