单项选择题
A.diag
B.lscfg
C.cfgmgr
D.lsattr
单项选择题 Asystem’sbackupsarefailing.Errorloganalysisindicatesthatthereiseitherahardwareormediaproblem.Whichcommandisusedtodetermineifthereisahardwareproblemwiththetapedrive？（）
单项选择题 Asystemadministratorwouldliketoverifytheuserdefinitionsinthe/etc/passwdfile.Whichofthefollowingcommandswillaccomplishthis？（）
单项选择题 Asystemadministratorhasbeenaskedtolockaspecificloginaccount.Whichofthefollowingcommandsisusedtoaccomplishthis？（）