单项选择题
A.’varyoffvg’ and ’exportvg’
B.’varyofflv’ and ’importvg’
C.’varyofflv’ and ’migratepv’
D.’varyoffvg’ and ’migratevg’
单项选择题 Anadministratorlearnsthatusersareunabletologintoaserverviassh.Aftermakingatelnetconnectiontotheserver，howcantheadministratorcheckthestatusofthesshdsubsystem？（）
单项选择题 AserverisexperiencingperformanceissuesandtheSANcouldbeapotentialbottleneck.Whichcommandwillshowthequeuedepthofhdisk1？（）
单项选择题 WhichisasupportedmethodtoupgradefirmwareonanIBMPowerSystems570？（）